Add rtc_use_memcheck flag, update MB and GN to handle it, and add gni files listing the runtime deps

webrtc/build/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 22 matching lines @@
       'Mac Asan': 'mac_asan_clang_release_bot_x64',
       'Mac64 Release [large tests]': 'release_bot_x64',
 
       # Linux
       'Linux32 Debug': 'debug_bot_x86',
       'Linux32 Release': 'release_bot_x86',
       'Linux32 ARM': 'release_bot_arm',
       'Linux64 Debug': 'debug_bot_x64',
       'Linux64 Release': 'release_bot_x64',
       'Linux Asan': 'asan_lsan_clang_release_bot_x64',
-      'Linux Memcheck': 'release_bot_x64',
+      'Linux Memcheck': 'memcheck_release_bot_x64',
       'Linux MSan': 'msan_clang_release_bot_x64',
       'Linux Tsan v2': 'tsan_clang_release_bot_x64',
       'Linux UBSan': 'ubsan_clang_release_bot_x64',
       'Linux UBSan vptr': 'ubsan_vptr_clang_release_bot_x64',
       'Linux64 Release [large tests]': 'release_bot_x64',
 
       # Android
       'Android32 (M Nexus5X)': 'android_release_bot_arm',
       'Android32 (M Nexus5X)(dbg)': 'android_debug_static_bot_arm',
       'Android64 (M Nexus5X)': 'android_release_bot_arm64',
@@ skipping 170 matching lines @@
     ],
     'release_bot_x64': [
       'gn', 'openh264_release_bot', 'x64'
     ],
     'perf_release_bot_x86': [
       'gn', 'openh264', 'release', 'static', 'goma', 'x86'
     ],
     'perf_release_bot_x64': [
       'gn', 'openh264', 'release', 'static', 'goma', 'x64'
     ],
+    'memcheck_release_bot_x64': [
+      'memcheck', 'gn', 'openh264_release_bot', 'x64'
+    ],
 
     # Windows
     'win_clang_debug_bot_x86': [
       'gn', 'clang', 'openh264_debug_bot', 'x86',
     ],
     'win_clang_release_bot_x86': [
       'gn', 'clang', 'openh264_release_bot', 'x86',
     ],
     'win_clang_debug_bot_x64': [
       'gn', 'clang', 'openh264_debug_bot', 'x64',
@@ skipping 117 matching lines @@
     },
 
     'ios': {
       'gn_args': 'target_os="ios"',
     },
 
     'lsan': {
       'gn_args': 'is_lsan=true',
     },
 
+    'memcheck': {
+      'gn_args': 'rtc_use_memcheck=true',
+    },
+
     'minimal_symbols': {
       'gn_args': 'symbol_level=1',
     },
 
     'mipsel': {
       'gn_args': 'target_cpu="mipsel"',
     },
 
     'minimal_symbols': {
       'gn_args': 'symbol_level=1',
@@ skipping 50 matching lines @@
 
     'x64': {
       'gn_args': 'target_cpu="x64"',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
     },
   },
 }