Integrate syzygy (optionally) into the chrome build process.

chrome/syzygy.gypi

Index: chrome/syzygy.gypi
===================================================================
--- chrome/syzygy.gypi	(revision 0)
+++ chrome/syzygy.gypi	(revision 0)
@@ -0,0 +1,52 @@
+# 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': {
+    'optimize_with_syzygy%': 0,
+  },
+  'conditions': [
+    [ 'OS=="win" and optimize_with_syzygy==1', {
+  	  'targets': [
+        {
+          'target_name': 'syzygy_optimized_binaries',
+          'type': 'none',
+          'sources' : [],
+          'dependencies': [
+            'chrome_dll',
+            'chrome',
+            'chrome_nacl_win64',
+            'default_extensions',
+          ],
+          'actions': [
+            {
+              'action_name': 'Optimize Chrome binaries with syzygy',
+              'variables':{
+                'variables': {
+                  'syzygy_ver%':
+                    '<!(cmd /C type <(DEPTH)\\tools\\syzygy\\LATEST)',
+                },
+                'syzygy_dir%': '<(DEPTH)\\tools\\syzygy\\<(syzygy_ver)',
+              },
+              'msvs_cygwin_shell': 0,
+              'inputs': [
+                '<(PRODUCT_DIR)\\chrome.dll',
+                '<(PRODUCT_DIR)\\chrome_dll.pdb',
+              ],
+              'outputs': [
+                '<(PRODUCT_DIR)\\THIS_SYZYGY_FILE_IS_NEVER_GENERATED_1.txt',
+              ],
+              'action': [
+                '<(syzygy_dir)\\optimize.bat',
+                '--verbose',
+                '--replace-originals',

[Sigurður Ásgeirsson, 2011/07/27 11:21:56]

Ah. This is going to be flaky. Let's discuss...

+                '--input-dir="<(PRODUCT_DIR)"',
+                '--output-dir="<(INTERMEDIATE_DIR)\\optimized"',
+              ],
+            },
+          ],
+        },
+      ],
+    }],
+  ],
+}