Re-add common.gypi to help fix closure_compilation.

build/gyp_chromium.py

 # 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.
 
 """This script is wrapper for Chromium that adds some support for how GYP
 is invoked by Chromium beyond what can be done in the gclient hooks.
 """
 
 import argparse
 import gc
@@ skipping 163 matching lines @@
       specified_includes.add(os.path.realpath(arg[2:]))
 
   result = []
   def AddInclude(path):
     if os.path.realpath(path) not in specified_includes:
       result.append(path)
 
   if os.environ.get('GYP_INCLUDE_FIRST') != None:
     AddInclude(os.path.join(chrome_src, os.environ.get('GYP_INCLUDE_FIRST')))
 
+  # Always include common.gypi.
+  AddInclude(os.path.join(script_dir, 'common.gypi'))
+
   # Optionally add supplemental .gypi files if present.
   for supplement in supplemental_files:
     AddInclude(supplement)
 
   if os.environ.get('GYP_INCLUDE_LAST') != None:
     AddInclude(os.path.join(chrome_src, os.environ.get('GYP_INCLUDE_LAST')))
 
   return result
 
 
@@ skipping 155 matching lines @@
     if vs2013_runtime_dll_dirs:
       x64_runtime, x86_runtime = vs2013_runtime_dll_dirs
       vs_toolchain.CopyVsRuntimeDlls(
         os.path.join(chrome_src, GetOutputDirectory()),
         (x86_runtime, x64_runtime))
 
   sys.exit(gyp_rc)
 
 if __name__ == '__main__':
   sys.exit(main())