Add PGO targets to Chrome.

chrome/chrome.gyp

 # 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.
 {
   'variables': {
     'chromium_code': 1,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
     # the link of the actual chrome (or chromium) executable on
@@ skipping 82 matching lines @@
     '../build/util/version.gypi',
     '../build/win_precompile.gypi',
     'chrome_browser.gypi',
     'chrome_browser_ui.gypi',
     'chrome_common.gypi',
     'chrome_installer_util.gypi',
     '../components/nacl/nacl_defines.gypi',
   ],
   'conditions': [
     ['OS!="ios"', {
+      'conditions': [
+        ['chrome_pgo!=1', {
+          'variables': {
+            'chrome_dll_target_name': 'chrome_dll',
+            'chrome_main_dll_target_name': 'chrome_main_dll',
+            'chrome_main_dll_product_name': 'chrome',
+            'chrome_child_dll_target_name': 'chrome_child_dll',
+            'chrome_child_dll_product_name': 'chrome_child',
+          },
+          'includes': [
+            'chrome_dll.gypi',
+          ],
+        }, {
+          'includes': [
+            'chrome_pgo.gypi',
+          ],
+        }],
+      ],
       'includes': [
         'chrome_browser_extensions.gypi',
-        'chrome_dll.gypi',
         'chrome_exe.gypi',
         'chrome_installer.gypi',
         'chrome_renderer.gypi',
         'chrome_tests.gypi',
         'chrome_tests_unit.gypi',
         'policy_templates.gypi',
         '../apps/apps.gypi',
       ],
       'targets': [
         {
@@ skipping 994 matching lines @@
               'sources': [
                 'service/cloud_print/print_system_dummy.cc',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }