[Release] Automatically notify mailing list on a pending merge

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 42 matching lines @@
       'filepath': 'src/flag-definitions.h',
     },
     'gc_changes': {
       'filepath': 'src/heap/',
     },
     'arm': {
       'filepath': '/arm/',
     },
     'ia32': {
       'filepath': '/ia32/',
+    },
+    'merges': {
+      'filepath': '.',
     }
   },
 
   'WATCHLISTS': {
     'public_api': [
       'phajdan.jr@chromium.org',
     ],
     'snapshot': [
       'yangguo@chromium.org',
     ],
@@ skipping 11 matching lines @@
       'hpayer@chromium.org',
       'ulan@chromium.org',
     ],
     'arm': [
       'v8-mips-ports@googlegroups.com',
       'v8-ppc-ports@googlegroups.com',
     ],
     'ia32': [
       'v8-x87-ports@googlegroups.com',
     ],
+    'merges': [
+      # Only enabled on branches created with tools/release/create_release.py
+      # 'v8-merges@googlegroups.com',
+    ],
   },
 }