Add the missing commas before MEMORY_TOOL_REPLACES_ALLOCATOR.

build/common.gypi

 # Copyright (c) 2012 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 2060 matching lines @@
       }],
       ['asan==1 and OS=="win"', {
         # Since asan on windows uses Syzygy, we need /PROFILE turned on to
         # produce appropriate pdbs.
         'msvs_settings': {
           'VCLinkerTool': {
             'Profile': 'true',
           },
         },
         'defines': [
-            'ADDRESS_SANITIZER'
+            'ADDRESS_SANITIZER',
             'MEMORY_TOOL_REPLACES_ALLOCATOR',
         ],
       }],  # asan==1 and OS=="win"
       ['coverage!=0', {
         'conditions': [
           ['OS=="mac" or OS=="ios"', {
             'xcode_settings': {
               'GCC_INSTRUMENT_PROGRAM_FLOW_ARCS': 'YES',  # -fprofile-arcs
               'GCC_GENERATE_TEST_COVERAGE_FILES': 'YES',  # -ftest-coverage
             },
@@ skipping 1198 matching lines @@
                       '-Wl,--no-keep-memory',
                     ],
                   }],
                 ],
               }],
             ],
           }],
           ['linux_use_heapchecker==1', {
             'variables': {'linux_use_tcmalloc%': 1},
             'defines': [
-                'USE_HEAPCHECKER'
+                'USE_HEAPCHECKER',
                 'MEMORY_TOOL_REPLACES_ALLOCATOR',
             ],
             'conditions': [
               ['component=="shared_library"', {
                 # See crbug.com/112389
                 # TODO(glider): replace with --dynamic-list or something
                 'ldflags': ['-rdynamic'],
               }],
             ],
           }],
@@ skipping 1257 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }