Integrate syzygy (optionally) into the chrome build process.

chrome/chrome.gyp

 # Copyright (c) 2011 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.
 {
   'variables': {
     'chromium_code': 1,
 
     'variables': {
       'version_py_path': 'tools/build/version.py',
       'version_path': 'VERSION',
@@ skipping 117 matching lines @@
     'chrome_browser.gypi',
     'chrome_common.gypi',
     'chrome_dll.gypi',
     'chrome_exe.gypi',
     'chrome_installer.gypi',
     'chrome_installer_util.gypi',
     'chrome_renderer.gypi',
     'chrome_tests.gypi',
     'common_constants.gypi',
     'nacl.gypi',
+    'syzygy.gypi',
   ],
   'targets': [
     {
       # TODO(mark): It would be better if each static library that needed
       # to run grit would list its own .grd files, but unfortunately some
       # of the static libraries currently have circular dependencies among
       # generated headers.
       'target_name': 'chrome_resources',
       'type': 'none',
       'actions': [
@@ skipping 1542 matching lines @@
             'destination': '<(PRODUCT_DIR)',
             'files': [
               '<(INTERMEDIATE_DIR)/repack/chrome.pak'
             ],
           },
         ],
       }],  # targets
     }],  # os_posix == 1 and OS != "mac"
   ],  # 'conditions'
 }