Update testing tools (AppRTC, Go) to new versions

webrtc/tools/testing/utils.py

 #!/usr/bin/env python
 # Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 """Utilities for all our deps-management stuff."""
 
-import hashlib
 import os
 import shutil
 import sys
 import subprocess
 import tarfile
 import time
 import zipfile
 
 
 def RunSubprocessWithRetry(cmd):
   """Invokes the subprocess and backs off exponentially on fail."""
   for i in range(5):
     try:
       subprocess.check_call(cmd)
       return
     except subprocess.CalledProcessError as exception:
       backoff = pow(2, i)
       print 'Got %s, retrying in %d seconds...' % (exception, backoff)
       time.sleep(backoff)
 
   print 'Giving up.'
   raise exception
 
 
-def DownloadFilesFromGoogleStorage(path):
+def DownloadFilesFromGoogleStorage(path, auto_platform=True):
   print 'Downloading files in %s...' % path
 
   extension = 'bat' if 'win32' in sys.platform else 'py'
   cmd = ['download_from_google_storage.%s' % extension,
          '--bucket=chromium-webrtc-resources',
-         '--auto_platform',
-         '--recursive',
          '--directory', path]
+  if auto_platform:
+    cmd += ['--auto_platform', '--recursive']
   subprocess.check_call(cmd)
 
 
-def ComputeSHA1(path):
-  if not os.path.exists(path):
-    return 0
-
-  sha1 = hashlib.sha1()
-  file_to_hash = open(path, 'rb')
-  try:
-    sha1.update(file_to_hash.read())
-  finally:
-    file_to_hash.close()
-
-  return sha1.hexdigest()
-
-
 # Code partially copied from
 # https://cs.chromium.org#chromium/build/scripts/common/chromium_utils.py
 def RemoveDirectory(*path):
   """Recursively removes a directory, even if it's marked read-only.
 
   Remove the directory located at *path, if it exists.
 
   shutil.rmtree() doesn't work on Windows if any of the files or directories
   are read-only, which svn repositories and some .svn files are.  We need to
   be able to force the files to be writable (i.e., deletable) as we traverse
@@ skipping 53 matching lines @@
 
 
 def GetPlatform():
   if sys.platform.startswith('win'):
     return 'win'
   if sys.platform.startswith('linux'):
     return 'linux'
   if sys.platform.startswith('darwin'):
     return 'mac'
   raise Exception("Can't run on platform %s." % sys.platform)