Add support for WebRTC patches to Chromium trybots

recipe_modules/gclient/config.py

 # Copyright 2013 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.
 
 import types
 
 from recipe_engine.config import config_item_context, ConfigGroup, BadConf
 from recipe_engine.config import ConfigList, Dict, Single, Static, Set, List
 
 from . import api as gclient_api
@@ skipping 154 matching lines @@
   p['parent_got_webrtc_revision'] = 'webrtc_revision'
 
   p = c.patch_projects
   p['v8'] = ('src/v8', 'HEAD')
   p['buildtools'] = ('src/buildtools', 'HEAD')
   p['angle/angle'] = ('src/third_party/angle', None)
   p['blink'] = ('src/third_party/WebKit', None)
   p['pdfium'] = ('src/third_party/pdfium', 'HEAD')
   p['skia'] = ('src/third_party/skia', 'HEAD')
   p['flac'] = ('src/third_party/flac', 'HEAD')
+  p['webrtc'] = ('src/third_party/webrtc', 'HEAD')

[tandrii(chromium), 2016/05/16 07:37:29]

based on this code
https://chromium.googlesource.com/chromium/tools/depot_tools/+/master/recipe_...

i think having here just 'src/third_party' might as well work. Make sure to add
a new test based on v8 in example.py of gclient (this) module and see
expectations.

[kjellander_chromium, 2016/05/16 08:24:48]

Chatted offline. It seems you're right: I created a test case in
https://codereview.chromium.org/1984623002/
using ./recipes.py -O depot_tools=~/dev/infra/depot_tools simulation_test train
of a build checkout.

 
 @config_ctx(includes=['chromium_bare'])
 def chromium_empty(c):
   c.solutions[0].deps_file = ''  # pragma: no cover
 
 @config_ctx(includes=['chromium_bare'])
 def chromium(c):
   s = c.solutions[0]
   s.custom_deps = mirror_only(c, {})
 
@@ skipping 478 matching lines @@
   soln = c.solutions.add()
   soln.name = 'gerrit-test-cq-normal'
   soln.url = 'https://chromium.googlesource.com/playground/gerrit-cq/normal.git'
 
 # TODO(phajdan.jr): Move to proper repo and add coverage.
 @config_ctx()
 def valgrind(c):  # pragma: no cover
   """Add Valgrind binaries to the gclient solution."""
   c.solutions[0].custom_deps['src/third_party/valgrind'] = \
     ChromiumGitURL(c, 'chromium', 'deps', 'valgrind', 'binaries')