[Release] CC hpayer@ and ulan@ to every heap change

WATCHLISTS

 # Copyright 2013 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 32 matching lines @@
       'filepath': 'src/debug/',
     },
     'interpreter': {
       'filepath': 'src/interpreter/',
       'filepath': 'test/cctest/interpreter/',
       'filepath': 'test/unittests/interpreter/',
     },
     'feature_shipping_status': {
       'filepath': 'src/flag-definitions.h',
     },
+    'gc_changes': {
+      'filepath': 'src/heap/',
+    },
   },
 
   'WATCHLISTS': {
     'public_api': [
       'phajdan.jr@chromium.org',
     ],
     'snapshot': [
       'yangguo@chromium.org',
     ],
     'debugger': [
       'yangguo@chromium.org',
     ],
     'interpreter': [
       'rmcilroy@chromium.org',
       'oth@chromium.org',
     ],
     'feature_shipping_status': [
       'hablich@chromium.org',
     ],
+    'gc_changes': [
+      'hpayer@chromium.org',
+      'ulan@chromium.org',
+    ],
   },
 }