Ensure bot_update env has CHROME_HEADLESS=1

This setting ensures that bot_update/gclient will delete conflicting directories instead of moving them to _bad_scm, which avoids wasting disk space on bots. Recipe-Nontrivial-Roll: build Recipe-Nontrivial-Roll: build_internal Recipe-Nontrivial-Roll: chrome_release Recipe-Nontrivial-Roll: chromiumos Recipe-Nontrivial-Roll: infra Bug: 462013257 Change-Id: I247427179205bf22bd24d142fa851d6628846a48 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/7208105 Reviewed-by: Yiwei Zhang <yiwzhang@google.com> Reviewed-by: Junji Watanabe <jwata@google.com> Commit-Queue: Gavin Mak <gavinmak@google.com>
2026-01-11 10:41:31 +00:00 · 2025-12-03 13:09:02 -08:00
parent de2b9aa7a6
commit 315ff3b4ec
38 changed files with 62 additions and 5 deletions
--- a/recipes/README.recipes.md
+++ b/recipes/README.recipes.md
@@ -65,12 +65,12 @@ Recipe module to ensure a checkout is consistent on a bot.

 Wrapper for easy calling of bot_update.

-&mdash; **def [deapply\_patch](/recipes/recipe_modules/bot_update/api.py#900)(self, bot_update_result):**
+&mdash; **def [deapply\_patch](/recipes/recipe_modules/bot_update/api.py#904)(self, bot_update_result):**

 Deapplies a patch, taking care of DEPS and solution revisions properly.
    

-&mdash; **def [ensure\_checkout](/recipes/recipe_modules/bot_update/api.py#386)(self, gclient_config=None, \*, suffix=None, patch=True, update_presentation=True, patch_root=None, with_branch_heads=False, with_tags=False, no_fetch_tags=False, refs=None, clobber=False, root_solution_revision=None, gerrit_no_reset=False, gerrit_no_rebase_patch_ref=False, assert_one_gerrit_change=True, patch_refs=None, ignore_input_commit=False, add_blamelists=False, set_output_commit=False, step_test_data=None, enforce_fetch=False, download_topics=False, recipe_revision_overrides=None, step_tags=None, clean_ignored=False, turboci_check_id: str='', \*\*kwargs):**
+&mdash; **def [ensure\_checkout](/recipes/recipe_modules/bot_update/api.py#390)(self, gclient_config=None, \*, suffix=None, patch=True, update_presentation=True, patch_root=None, with_branch_heads=False, with_tags=False, no_fetch_tags=False, refs=None, clobber=False, root_solution_revision=None, gerrit_no_reset=False, gerrit_no_rebase_patch_ref=False, assert_one_gerrit_change=True, patch_refs=None, ignore_input_commit=False, add_blamelists=False, set_output_commit=False, step_test_data=None, enforce_fetch=False, download_topics=False, recipe_revision_overrides=None, step_tags=None, clean_ignored=False, turboci_check_id: str='', \*\*kwargs):**

 Args:
  * gclient_config: The gclient configuration to use when running bot_update.
@@ -113,7 +113,7 @@ Args:
    if a non-empty value is provided and the gclient config doesn't have
    exactly 1 solution.

-&mdash; **def [get\_project\_revision\_properties](/recipes/recipe_modules/bot_update/api.py#877)(self, project_name, gclient_config=None):**
+&mdash; **def [get\_project\_revision\_properties](/recipes/recipe_modules/bot_update/api.py#881)(self, project_name, gclient_config=None):**

 Returns all property names used for storing the checked-out revision of
 a given project.
@@ -129,12 +129,12 @@ Returns (list of str): All properties that'll hold the checked-out revision

 &emsp; **@property**<br>&mdash; **def [last\_returned\_properties](/recipes/recipe_modules/bot_update/api.py#294)(self):**

-&mdash; **def [resolve\_fixed\_revision](/recipes/recipe_modules/bot_update/api.py#828)(self, bot_update_result, name):**
+&mdash; **def [resolve\_fixed\_revision](/recipes/recipe_modules/bot_update/api.py#832)(self, bot_update_result, name):**

 Sets a fixed revision for a single dependency using project revision
 properties.

-&mdash; **def [step\_name](/recipes/recipe_modules/bot_update/api.py#917)(self, patch, suffix):**
+&mdash; **def [step\_name](/recipes/recipe_modules/bot_update/api.py#921)(self, patch, suffix):**
 ### *recipe_modules* / [depot\_tools](/recipes/recipe_modules/depot_tools)

 [DEPS](/recipes/recipe_modules/depot_tools/__init__.py#6): [recipe\_engine/cipd][recipe_engine/recipe_modules/cipd], [recipe\_engine/context][recipe_engine/recipe_modules/context], [recipe\_engine/platform][recipe_engine/recipe_modules/platform], [recipe\_engine/runtime][recipe_engine/recipe_modules/runtime]
--- a/recipes/recipe_modules/bot_update/api.py
+++ b/recipes/recipe_modules/bot_update/api.py
@@ -331,6 +331,10 @@ class BotUpdateApi(recipe_api.RecipeApi):
    # bytes/second for GIT_HTTP_LOW_SPEED_TIME seconds then such request will be
    # aborted. Otherwise, it would wait for global timeout to be reached.
    env = {
+        # CHROME_HEADLESS makes it so we don't create gclient's _bad_scm dir
+        # and instead just remove/restart checkout from scratch.
+        'CHROME_HEADLESS':
+        '1',
        'GIT_HTTP_LOW_SPEED_LIMIT':
        '102400',  # in bytes
        'GIT_HTTP_LOW_SPEED_TIME':
--- a/recipes/recipe_modules/bot_update/examples/full.expected/add_blamelists.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/add_blamelists.json
@@ -24,6 +24,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/add_blamelists_bot_update_failure.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/add_blamelists_bot_update_failure.json
@@ -24,6 +24,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/basic.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/basic.json
@@ -22,6 +22,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/basic_with_branch_heads.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/basic_with_branch_heads.json
@@ -23,6 +23,7 @@
      "--with_branch_heads"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/bot_update_failure.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/bot_update_failure.json
@@ -22,6 +22,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/clobber.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/clobber.json
@@ -21,6 +21,7 @@
      "--clobber"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -149,6 +150,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/deprecated_got_revision_mapping.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/deprecated_got_revision_mapping.json
@@ -81,6 +81,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -184,6 +185,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/gerrit_no_rebase_patch_ref.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/gerrit_no_rebase_patch_ref.json
@@ -21,6 +21,7 @@
      "--gerrit_no_rebase_patch_ref"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -149,6 +150,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/gerrit_no_reset.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/gerrit_no_reset.json
@@ -21,6 +21,7 @@
      "--gerrit_no_reset"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -149,6 +150,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/input_commit_with_id_without_repo.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/input_commit_with_id_without_repo.json
@@ -20,6 +20,7 @@
      "src@aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -159,6 +160,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/multiple_patch_refs.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/multiple_patch_refs.json
@@ -24,6 +24,7 @@
      "src@HEAD"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -152,6 +153,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/no_cp_checkout_HEAD.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/no_cp_checkout_HEAD.json
@@ -22,6 +22,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/no_cp_checkout_a_branch_head.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/no_cp_checkout_a_branch_head.json
@@ -22,6 +22,7 @@
      "refs/branch-heads/x"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/no_cp_checkout_a_specific_commit.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/no_cp_checkout_a_specific_commit.json
@@ -22,6 +22,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/no_cp_checkout_main.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/no_cp_checkout_main.json
@@ -22,6 +22,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/origin_main.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/origin_main.json
@@ -22,6 +22,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/refs.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/refs.json
@@ -22,6 +22,7 @@
      "+refs/change/1/2/333"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -150,6 +151,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/reset_root_solution_revision.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/reset_root_solution_revision.json
@@ -20,6 +20,7 @@
      "src@b0ff6a5b8b2bd8a31e9b5e29710da5275f0a9322"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -148,6 +149,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/resolve_chromium_fixed_version.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/resolve_chromium_fixed_version.json
@@ -22,6 +22,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/revision_fallback_chain_set_output_commit.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/revision_fallback_chain_set_output_commit.json
@@ -20,6 +20,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/revision_specifying_ref.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/revision_specifying_ref.json
@@ -24,6 +24,7 @@
      "refs/branch-heads/4000"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/stale-process-duration-override.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/stale-process-duration-override.json
@@ -22,6 +22,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/ci/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_fail.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_fail.json
@@ -81,6 +81,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_fail_patch.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_fail_patch.json
@@ -81,6 +81,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_fail_patch_download.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_fail_patch_download.json
@@ -81,6 +81,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_angle.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_angle.json
@@ -81,6 +81,7 @@
      "src/third_party/angle@refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -226,6 +227,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_branch_heads.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_branch_heads.json
@@ -81,6 +81,7 @@
      "refs/branch-heads/67"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -223,6 +224,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_feature_branch.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_feature_branch.json
@@ -81,6 +81,7 @@
      "refs/heads/experimental/feature"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -223,6 +224,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_v8_feature_branch.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_v8_feature_branch.json
@@ -81,6 +81,7 @@
      "src/v8@refs/heads/experimental/feature"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -226,6 +227,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_webrtc.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_webrtc.json
@@ -81,6 +81,7 @@
      "src/third_party/webrtc@refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -236,6 +237,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_v8.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_v8.json
@@ -81,6 +81,7 @@
      "src/v8@abc"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -226,6 +227,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_v8_head_by_default.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/tryjob_v8_head_by_default.json
@@ -81,6 +81,7 @@
      "src/v8@refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -226,6 +227,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/upload_traces.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/upload_traces.json
@@ -81,6 +81,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/upload_traces_fail.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/upload_traces_fail.json
@@ -81,6 +81,7 @@
      "refs/heads/main"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_REPORT_BUILD": "chromium/src/try/linux/8945511751514863184",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/with_experiments.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/with_experiments.json
@@ -21,6 +21,7 @@
      "--experiments=no_sync,cool_experiment"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -150,6 +151,7 @@
      "--experiments=no_sync,cool_experiment"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
--- a/recipes/recipe_modules/bot_update/examples/full.expected/with_tags.json
+++ b/recipes/recipe_modules/bot_update/examples/full.expected/with_tags.json
@@ -21,6 +21,7 @@
      "--with_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",
@@ -149,6 +150,7 @@
      "--no_fetch_tags"
    ],
    "env": {
+      "CHROME_HEADLESS": "1",
      "DEPOT_TOOLS_COLLECT_METRICS": "0",
      "GIT_BACKENDINFO": "1",
      "GIT_DAPPER_TRACE": "1",