try -O1 to speed up msan bot

gyp/common_conditions.gypi

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # conditions used in both common.gypi and skia.gyp in chromium
 #
 {
   'defines': [
     'SK_ALLOW_STATIC_GLOBAL_INITIALIZERS=<(skia_static_initializers)',
@@ skipping 434 matching lines @@
               '-fno-sanitize-recover=<(skia_sanitizer)',          # Make any failure fatal.
               '-fsanitize-blacklist=<(skia_sanitizer_blacklist)', # Compile in our blacklist.
               '-include <(skia_sanitizer_blacklist)',             # Make every .cpp depend on it.
             ],
             'ldflags': [ '-fsanitize=<(skia_sanitizer)' ],
             'conditions' : [
               [ 'skia_sanitizer == "thread"', {
                 'defines': [ 'THREAD_SANITIZER' ],
               }],
               [ 'skia_sanitizer == "memory"', {
-                'cflags': [ '-fsanitize-memory-track-origins' ],
+                'cflags': [
+                    '-O1',
+                    '-fsanitize-memory-track-origins',
+                ],
               }],
             ],
           }],
           [ 'skia_clang_build', {
             'cflags_cc': [
                 '-Wno-unknown-warning-option',  # Allows unknown warnings.
                 '-Wno-deprecated',              # From Qt, via debugger (older Clang).
                 '-Wno-deprecated-register',     # From Qt, via debugger (newer Clang).
             ],
             'cflags': [
@@ skipping 202 matching lines @@
           'LD_RUNPATH_SEARCH_PATHS': ['@executable_path/.'],
       },
     }],
 
   ], # end 'conditions'
   # The Xcode SYMROOT must be at the root. See build/common.gypi in chromium for more details
   'xcode_settings': {
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }