Revert r45652 and r45653. It broke the single file export

feature.

TBR=piman,jamesr
Review URL: http://codereview.chromium.org/1730014

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@45660 0039d316-1c4b-4281-b951-d872f2087c98

gclient_utils.py

@@ -17,14 +17,11 @@
 import errno
 import logging
 import os
-import Queue
 import re
 import stat
 import subprocess
 import sys
 import time
-import threading
-import traceback
 import xml.dom.minidom
 import xml.parsers.expat
 
@@ -356,106 +353,3 @@ def GetGClientRootAndEntries(path=None):
   execfile(config_path, env)
   config_dir = os.path.dirname(config_path)
   return config_dir, env['entries']
-
-
-class ThreadPool:
-  """A thread pool class that lets one schedule jobs on many worker threads."""
-
-  def __init__(self, threads=1):
-    self._threads = threads
-    self._queue = Queue.Queue()
-    self._jobs_left = 0
-    self._condition = threading.Condition()
-    self._workers = []
-
-  class Worker(threading.Thread):
-    """Internal worker class that executes jobs from the ThreadPool queue."""
-
-    def __init__(self, pool):
-      threading.Thread.__init__(self)
-      self._pool = pool
-      self._done = False
-      self.exceptions = []
-
-    def Done(self):
-      """Terminates the worker threads."""
-      self._done = True
-
-    def run(self):
-      """Executes jobs from the pool's queue."""
-      while not self._done:
-        f = self._pool._queue.get()
-        try:
-          try:
-            f(self)
-          except Exception, e:
-            # Catch all exceptions, otherwise we can't join the thread. Print
-            # the backtrace now, but keep the exception so that we can raise it
-            # on the main thread.
-            type, value, tb = sys.exc_info()
-            traceback.print_exception(type, value, tb)
-            self.exceptions.append(e)
-        finally:
-          self._pool._JobDone()
-
-  def _AddJobToQueue(self, job):
-    self._condition.acquire()
-    self._queue.put(job)
-    self._jobs_left += 1
-    self._condition.release()
-
-  def _JobDone(self):
-    self._condition.acquire()
-    try:
-      assert self._jobs_left
-      self._jobs_left -= 1
-      if self._jobs_left == 0:
-        self._condition.notify()
-    finally:
-      self._condition.release()
-
-  def _JoinQueue(self):
-    self._condition.acquire()
-    try:
-      while self._jobs_left:
-        self._condition.wait()
-    finally:
-      self._condition.release()
-
-  def Start(self):
-    """Starts the thread pool. Spawns worker threads."""
-    assert not self._workers
-    for i in xrange(0, self._threads):
-      worker = self.Worker(self)
-      self._workers.append(worker)
-      worker.start()
-
-  def Stop(self):
-    """Stops the thread pool. Joins all worker threads."""
-    assert self._workers
-    for i in xrange(0, len(self._workers)):
-      wrapped = lambda thread: thread.Done()
-      self._AddJobToQueue(wrapped)
-    self._JoinQueue()
-    for worker in self._workers:
-      worker.join()
-    try:
-      for worker in self._workers:
-        for e in worker.exceptions:
-          # If we collected exceptions, raise them now.
-          raise e
-    finally:
-      self._workers = []
-
-  def AddJob(self, function):
-    """Adds a job to the queue.
-    
-    A job is a simple closure, that will get executed on one of the worker
-    threads."""
-    wrapped = lambda worker: function()
-    self._AddJobToQueue(wrapped)
-
-  def WaitJobs(self):
-    """Waits for all jobs to be completed."""
-    assert self._workers
-    self._JoinQueue()