Add Large Tests bots for WebRTC

masters/master.tryserver.webrtc/master.cfg

 #!/usr/bin/env python
 #  Copyright (c) 2012 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.
 
 # These modules come from scripts, which must be in the PYTHONPATH.
@@ skipping 176 matching lines @@
         options=ninja_options,
         tests=tests)
 }
 
 b_linux_memcheck = {
     'name': 'linux_memcheck',
     'factory': linux().WebRTCFactory(
         target='Release',
         slave_type='Trybot',
         options=ninja_options,
-        tests=tests,
+        tests=['memcheck_' + test for test in tests],
         factory_properties={
             'needs_valgrind': True,
             'gclient_env': {'GYP_DEFINES': 'build_for_tool=memcheck'},
         })
 }
 
 b_linux_tsan = {
     'name': 'linux_tsan',
     'factory': linux().WebRTCFactory(
         target='Release',
         slave_type='Trybot',
         options=ninja_options,
-        tests=tests,
+        tests=['tsan_' + test for test in tests],
         factory_properties={
             'needs_valgrind': True,
             'gclient_env': {'GYP_DEFINES': 'build_for_tool=tsan'},
         })
 }
 
 b_linux_asan = {
     'name': 'linux_asan',
     'factory': linux().WebRTCFactory(
         target='Release',
@@ skipping 135 matching lines @@
 c['buildCacheSize'] = 100
 
 ####### PROJECT IDENTITY
 
 # The 'projectURL' string will be used to provide a link
 # from buildbot HTML pages to your project's home page.
 c['projectURL'] = 'http://dev.chromium.org/developers/testing/try-server-usage'
 
 # Buildbot master url:
 c['buildbotURL'] = 'http://build.chromium.org/p/tryserver.webrtc/'