old_contents: # Copyright (c) 2012 The Chromium Authors. All rights reserved.
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
  """Small utility function to find depot_tools and add it to the python path.
  
  Will throw an ImportError exception if depot_tools can't be found since it
  imports breakpad.
  """
  
  import os
  import sys
  
  def add_depot_tools_to_path():
    """Search for depot_tools and add it to sys.path."""
    # First look if depot_tools is already in PYTHONPATH.
    for i in sys.path:
      if i.rstrip(os.sep).endswith('depot_tools'):
        return i
    # Then look if depot_tools is in PATH, common case.
    for i in os.environ['PATH'].split(os.pathsep):
      if i.rstrip(os.sep).endswith('depot_tools'):
        sys.path.insert(0, i.rstrip(os.sep))
        return i
    # Rare case, it's not even in PATH, look upward up to root.
    root_dir = os.path.dirname(os.path.abspath(__file__))
    previous_dir = os.path.abspath(__file__)
    while root_dir and root_dir != previous_dir:
      if os.path.isfile(os.path.join(root_dir, 'depot_tools', 'breakpad.py')):
        i = os.path.join(root_dir, 'depot_tools')
        sys.path.insert(0, i)
        return i
      previous_dir = root_dir
      root_dir = os.path.dirname(root_dir)
    print >> sys.stderr, 'Failed to find depot_tools'
    return None
  
  add_depot_tools_to_path()
  
  # pylint: disable=W0611
  import breakpad
  
new_contents: # Copyright (c) 2012 The Chromium Authors. All rights reserved.
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
  """Small utility function to find depot_tools and add it to the python path.
  
  Will throw an ImportError exception if depot_tools can't be found since it
  imports breakpad.
  """
  
  import os
  import sys
  
  
  def directory_really_is_depot_tools(directory):
    return os.path.isfile(os.path.join(directory, 'breakpad.py'))
  
  
  def add_depot_tools_to_path():
    """Search for depot_tools and add it to sys.path."""
    # First look if depot_tools is already in PYTHONPATH.
    for i in sys.path:
      if i.rstrip(os.sep).endswith('depot_tools'):
        if directory_really_is_depot_tools(i):
          return i
    # Then look if depot_tools is in PATH, common case.
    for i in os.environ['PATH'].split(os.pathsep):
      if i.rstrip(os.sep).endswith('depot_tools'):
        if directory_really_is_depot_tools(i):
          sys.path.insert(0, i.rstrip(os.sep))
          return i
    # Rare case, it's not even in PATH, look upward up to root.
    root_dir = os.path.dirname(os.path.abspath(__file__))
    previous_dir = os.path.abspath(__file__)
    while root_dir and root_dir != previous_dir:
      if directory_really_is_depot_tools(os.path.join(root_dir, 'depot_tools')):
        i = os.path.join(root_dir, 'depot_tools')
        sys.path.insert(0, i)
        return i
      previous_dir = root_dir
      root_dir = os.path.dirname(root_dir)
    print >> sys.stderr, 'Failed to find depot_tools'
    return None
  
  add_depot_tools_to_path()
  
  # pylint: disable=W0611
  import breakpad
  
subject: Make find_depot_tools.py more robust.