Add a DEPS gclient hook to prune corrupt mockito remote.

A third_party remote for third_party/mockito/src is corrupt. Run
`git remote prune origin` in the checkout directory before syncing
Chromium.

Thanks to slan@ for providing this fix.

TBR=kjellander@webrtc.org
BUG=chromium:644722
NOTRY=True

Review-Url: https://codereview.webrtc.org/2326523002
Cr-Commit-Position: refs/heads/master@{#14138}

DEPS

@@ -34,6 +34,17 @@ hooks = [
                 '_ = os.system("%s %s" % (sys.executable,script)) '
                 'if os.path.exists(script) else 0')],
   },
+  {
+    # TODO(kjellander): Remove when (crbug.com/644722 is fixed.
+    # This prunes origin for the mockito repo, which has some conflicting refs
+    # in the remote.
+    'name': 'local_prune_mockito_refs',
+    'pattern': '.',
+    'action': [
+       'python',
+       'src/webrtc/build/prune_third_party_mockito_origin.py'
+    ],
+  },
   {
     # Clone chromium and its deps.
     'name': 'sync chromium',

sync_chromium.py

@@ -31,7 +31,7 @@ import textwrap
 
 # Bump this whenever the algorithm changes and you need bots/devs to re-sync,
 # ignoring the .last_sync_chromium file
-SCRIPT_VERSION = 8
+SCRIPT_VERSION = 9
 
 ROOT_DIR = os.path.dirname(os.path.abspath(__file__))
 CHROMIUM_NO_HISTORY = 'CHROMIUM_NO_HISTORY'

webrtc/build/prune_third_party_mockito_origin.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2016 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.
+
+# Used to work around an upstream bug (crbug.com/644722).
+# This file will be removed ASAP.
+
+import os
+import subprocess
+import sys
+
+# Path to the corrupt project.
+MOCKITO_CHECKOUT_PATH = 'src/third_party/mockito/src'
+
+
+def main():
+  # If this checkout exists, run `git remote prune origin` from it.
+  if os.path.isdir(MOCKITO_CHECKOUT_PATH):
+    subprocess.check_output(
+        ['git', 'remote', 'prune', 'origin'], cwd=MOCKITO_CHECKOUT_PATH)
+  else:
+    sys.stdout.write('{} does not exist!\n'.format(MOCKITO_CHECKOUT_PATH))
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main())