MB: Add configs for Windows bots enforcing MSVC compilation.

tools_webrtc/mb/mb_config.pyl

 # 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.
 
 # FOR DETAILS ON THIS FILE SEE THE MAIN COPY IN //tools/mb/mb_config.pyl.
 # This is configuration for standalone WebRTC bots. It is used to keep the bot
@@ skipping 56 matching lines @@
       # Windows
       'Win32 Debug': 'debug_bot_x86',
       'Win32 Release': 'release_bot_x86',
       'Win64 Debug': 'debug_bot_x64',
       'Win64 Release': 'release_bot_x64',
       'Win32 Debug (Clang)': 'win_clang_debug_bot_x86',
       'Win32 Release (Clang)': 'win_clang_release_bot_x86',
       'Win64 Debug (Clang)': 'win_clang_debug_bot_x64',
       'Win64 Release (Clang)': 'win_clang_release_bot_x64',
       'Win32 ASan': 'win_asan_clang_release_bot_x86',
+      'Win32 Release (MSVC)': 'win_msvc_release_bot_x86',
       'Win32 Release [large tests]': 'release_bot_x86',
     },
     'client.webrtc.perf': {
       # Android
       'Android32 Builder': 'perf_android_release_bot_arm',
       'Android64 Builder': 'perf_android_release_bot_arm64',
       'Android32 Tests (J Nexus4)': 'none',
       'Android32 Tests (K Nexus5)': 'none',
       'Android32 Tests (L Nexus5)': 'none',
       'Android32 Tests (L Nexus6)': 'none',
@@ skipping 93 matching lines @@
       'win_compile_x64_rel': 'release_bot_x64',
       'win_dbg': 'debug_bot_x86',
       'win_rel': 'release_bot_x86',
       'win_x64_dbg': 'debug_bot_x64',
       'win_x64_rel': 'release_bot_x64',
       'win_clang_dbg': 'win_clang_debug_bot_x86',
       'win_clang_rel': 'win_clang_release_bot_x86',
       'win_x64_clang_dbg': 'win_clang_debug_bot_x64',
       'win_x64_clang_rel': 'win_clang_release_bot_x64',
       'win_asan': 'win_asan_clang_release_bot_x86',
+      'win_msvc_rel': 'win_msvc_release_bot_x86',
       'win_baremetal': 'release_bot_x86',
       'win_x64_win8': 'debug_bot_x64',
       'win_x64_win10': 'debug_bot_x64',
     }
   },
 
   # This is the list of configs that you can pass to mb; each config
   # represents a particular combination of gn args that we must support.
   # A given config *may* be platform-specific but is not necessarily so (i.e.,
   # we might have mac, win, and linux bots all using the 'release_bot' config).
@@ skipping 72 matching lines @@
     ],
     'win_clang_release_bot_x86': [
       'gn', 'clang', 'openh264_release_bot', 'x86',
     ],
     'win_clang_debug_bot_x64': [
       'gn', 'clang', 'openh264_debug_bot', 'x64',
     ],
     'win_clang_release_bot_x64': [
       'gn', 'clang', 'openh264_release_bot', 'x64',
     ],
+    'win_msvc_release_bot_x86': [
+      'gn', 'no_clang', 'openh264_release_bot', 'x86',
+    ],
     'win_asan_clang_release_bot_x86': [
       'gn', 'asan', 'clang',  'full_symbols', 'openh264_release_bot', 'x86',
       'win_fastlink',
     ],
 
     # Mac
     'mac_asan_clang_release_bot_x64': [
       'gn', 'asan', 'clang', 'openh264_release_bot', 'x64',
     ],
 
@@ skipping 122 matching lines @@
 
     'mipsel': {
       'gn_args': 'target_cpu="mipsel"',
     },
 
     'msan': {
       'gn_args': ('is_msan=true msan_track_origins=2 '
                   'use_prebuilt_instrumented_libraries=true'),
     },
 
+    'no_clang': {
+      'gn_args': 'is_clang=false',
+    },
+
     'no_rtc_tests': {
       'gn_args': 'rtc_include_tests=false',
     },
 
     'openh264': {
       'gn_args': 'ffmpeg_branding="Chrome" rtc_use_h264=true',
     },
 
     'openh264_debug_bot': {
       'mixins': ['openh264', 'debug_bot'],
@@ skipping 37 matching lines @@
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
     },
 
     'use_default_libcxx': {
       'gn_args': 'use_custom_libcxx=false',
     }
   },
 }