Integrate syzygy (optionally) into the chrome build process.

chrome/installer/mini_installer.gyp

 {
   'variables': {
     'version_py': '../../chrome/tools/build/version.py',
     'version_path': '../../chrome/VERSION',
     'lastchange_path': '<(SHARED_INTERMEDIATE_DIR)/build/LASTCHANGE',
     # 'branding_dir' is set in the 'conditions' section at the bottom.
     'msvs_use_common_release': 0,
     'msvs_use_common_linker_extras': 0,
+    'optimize_with_syzygy%': 0,

[chrisha, 2011/07/26 23:47:24]

What does the trailing '%' do?

   },
   'conditions': [
     ['OS=="win"', {
       'target_defaults': {
         'dependencies': [
           '../chrome.gyp:chrome',
           '../chrome.gyp:chrome_nacl_win64',
           '../chrome.gyp:chrome_dll',
           '../chrome.gyp:default_extensions',
           '../chrome.gyp:setup',
@@ skipping 149 matching lines @@
         ],
       },
       'targets': [
         {
           'target_name': 'mini_installer',
           'type': 'executable',
           'sources': [
             'mini_installer/chrome.release',
             'mini_installer/chrome_appid.cc',
           ],
+          'conditions': [
+            ['optimize_with_syzygy==1', {
+              'dependencies' : [
+                '../chrome.gyp:syzygy_optimized_binaries',
+              ],
+            }],
+          ],
           'rules': [
             {
               'rule_name': 'installer_archive',
               'extension': 'release',
               'variables': {
                 'create_installer_archive_py_path':
                   '../tools/build/win/create_installer_archive.py',
               },
               'inputs': [
                 '<(create_installer_archive_py_path)',
@@ skipping 37 matching lines @@
       'variables': {
          'branding_dir': '../app/theme/google_chrome',
       },
     }, { # else branding!="Chrome"
       'variables': {
          'branding_dir': '../app/theme/chromium',
       },
     }],
   ],
 }