Create MSan config for Chromium recipe module + add WebRTC MSan recipe.

scripts/slave/recipe_modules/chromium/chromium_memory_fyi.py

 # Copyright 2014 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.
 
 from . import steps
 
 SPEC = {
   'settings': {
     'build_gs_bucket': 'chromium-memory-fyi-archive',
   },
   'builders': {
     'Chromium Linux MSan Builder': {
-      'recipe_config': 'chromium_clang',
+      'recipe_config': 'chromium_msan',
+      'chromium_apply_config': ['instrumented_libraries'],
       'GYP_DEFINES': {
-        'msan': 1,
         'msan_track_origins': 0,
-        'use_instrumented_libraries': 1,
-        'instrumented_libraries_jobs': 10,
       },
       'chromium_config_kwargs': {
         'BUILD_CONFIG': 'Release',
         'TARGET_BITS': 64,
       },
       'bot_type': 'builder',
       'testing': {
         'platform': 'linux',
       },
     },
     'Linux MSan Tests': {
-      'recipe_config': 'chromium_clang',
-      'GYP_DEFINES': {
-        # Required on testers to pass the right runtime flags.
-        # TODO(earthdok): make this part of a chromium_msan recipe config.
-        'msan': 1,
-      },
+      'recipe_config': 'chromium_msan',
       'chromium_config_kwargs': {
         'BUILD_CONFIG': 'Release',
         'TARGET_BITS': 64,
       },
       'bot_type': 'tester',
       'test_generators': [
         steps.generate_gtest,
       ],
       'parent_buildername': 'Chromium Linux MSan Builder',
       'testing': {
         'platform': 'linux',
       },
     },
     'Linux MSan Browser (1)': {
-      'recipe_config': 'chromium_clang',
-      'GYP_DEFINES': {
-        # Required on testers to pass the right runtime flags.
-        # TODO(earthdok): make this part of a chromium_msan recipe config.
-        'msan': 1,
-      },
+      'recipe_config': 'chromium_msan',
       'chromium_config_kwargs': {
         'BUILD_CONFIG': 'Release',
         'TARGET_BITS': 64,
       },
       'bot_type': 'tester',
       'test_generators': [
         steps.generate_gtest,
       ],
       'parent_buildername': 'Chromium Linux MSan Builder',
       'testing': {
         'platform': 'linux',
       },
     },
     'Linux MSan Browser (2)': {
-      'recipe_config': 'chromium_clang',
-      'GYP_DEFINES': {
-        # Required on testers to pass the right runtime flags.
-        # TODO(earthdok): make this part of a chromium_msan recipe config.
-        'msan': 1,
-      },
+      'recipe_config': 'chromium_msan',
       'chromium_config_kwargs': {
         'BUILD_CONFIG': 'Release',
         'TARGET_BITS': 64,
       },
       'bot_type': 'tester',
       'test_generators': [
         steps.generate_gtest,
       ],
       'parent_buildername': 'Chromium Linux MSan Builder',
       'testing': {
         'platform': 'linux',
       },
     },
     'Linux MSan Browser (3)': {
-      'recipe_config': 'chromium_clang',
-      'GYP_DEFINES': {
-        # Required on testers to pass the right runtime flags.
-        # TODO(earthdok): make this part of a chromium_msan recipe config.
-        'msan': 1,
-      },
+      'recipe_config': 'chromium_msan',
       'chromium_config_kwargs': {
         'BUILD_CONFIG': 'Release',
         'TARGET_BITS': 64,
       },
       'bot_type': 'tester',
       'test_generators': [
         steps.generate_gtest,
       ],
       'parent_buildername': 'Chromium Linux MSan Builder',
       'testing': {
         'platform': 'linux',
       },
     },
   },
 }