Add PGO targets to Chrome.

chrome/chrome_dll.gypi

 # 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.
 {
   'conditions': [
     ['OS=="mac" or OS=="win"', {
       'targets': [
         {
           'target_name': 'chrome_dll',
           'type': 'none',
@@ skipping 202 matching lines @@
                 ['enable_printing!=0', {
                   'dependencies': [
                     '../printing/printing.gyp:printing',
                   ],
                 }],
                 ['component!="shared_library"', {  # http://crbug.com/339215
                   'dependencies': [
                     'chrome_dll_pdb_workaround',
                    ],
                 }],
+                ['chrome_pgo_phase==1', {
+                  'msvs_settings': {
+                    'VCLinkerTool': {
+                      'LinkTimeCodeGeneration': '2',
+                    },
+                  },
+                }],
+                ['chrome_pgo_phase==2', {
+                  'msvs_settings': {
+                    'VCLinkerTool': {
+                      'LinkTimeCodeGeneration': '3',
+                    },
+                  },
+                }],
               ]
             }],
             ['chrome_multiple_dll==1', {
               'defines': [
                 'CHROME_MULTIPLE_DLL_BROWSER',
               ],
             }, {
               'dependencies': [
                 '<@(chromium_child_dependencies)',
                 '../content/content.gyp:content_app_both',
@@ skipping 128 matching lines @@
             '<(SHARED_INTERMEDIATE_DIR)/chrome_version/chrome_dll_version.rc',
             'app/chrome_main.cc',
             'app/chrome_main_delegate.cc',
             'app/chrome_main_delegate.h',
           ],
           'conditions': [
             ['OS=="win"', {
               'dependencies': [
                 '<(DEPTH)/chrome_elf/chrome_elf.gyp:chrome_elf',
               ],
+              'conditions': [
+                ['chrome_pgo_phase==1', {
+                  'msvs_settings': {
+                    'VCLinkerTool': {
+                      'LinkTimeCodeGeneration': '2',
+                    },
+                  },
+                }],
+                ['chrome_pgo_phase==2', {
+                  'msvs_settings': {
+                    'VCLinkerTool': {
+                      'LinkTimeCodeGeneration': '3',
+                    },
+                  },
+                }],
+              ]
             }],
           ],
         },  # target chrome_child_dll
       ],
     }],
   ],
 }