Add a DEPS gclient hook to prune corrupt mockito remote.

DEPS

 # This file contains dependencies for WebRTC that are not shared with Chromium.
 # If you wish to add a dependency that is present in Chromium's src/DEPS or a
 # directory from the Chromium checkout, you should add it to setup_links.py
 # instead.
 
 vars = {
   'extra_gyp_flag': '-Dextra_gyp_flag=0',
   'chromium_git': 'https://chromium.googlesource.com',
   'chromium_revision': 'cf9457edb7c734f509dd12149acd78410c518570',
 }
@@ skipping 17 matching lines @@
     # Check for legacy named top-level dir (named 'trunk').
     'name': 'check_root_dir_name',
     'pattern': '.',
     'action': ['python','-c',
                ('import os,sys;'
                 'script = os.path.join("trunk","check_root_dir.py");'
                 '_ = 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',
     'pattern': '.',
     'action': ['python', '-u', 'src/sync_chromium.py',
                '--target-revision', Var('chromium_revision')],
   },
   {
     # Create links to shared dependencies in Chromium.
     'name': 'setup_links',
     'pattern': '.',
@@ skipping 30 matching lines @@
                '--directory',
                '--recursive',
                '--num_threads=10',
                '--no_auth',
                '--quiet',
                '--bucket', 'chromium-webrtc-resources',
                'src/resources'],
   },
 ]