Only use the PGO optimizations on chrome_child.dll

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': [
     # Dummy target to allow chrome to require chrome_dll to build
     # without actually linking to the library
     ['OS=="mac"', {
       'targets': [
         {
@@ skipping 242 matching lines @@
                 ['win_use_allocator_shim==1', {
                   'dependencies': [
                     '<(allocator_target)',
                   ],
                 }],
                 ['enable_basic_printing==1 or enable_print_preview==1', {
                   'dependencies': [
                     '../printing/printing.gyp:printing',
                   ],
                 }],
-                ['chrome_pgo_phase==1', {
-                  'msvs_settings': {
-                    'VCLinkerTool': {
-                      'LinkTimeCodeGeneration': '2',
-                      'AdditionalOptions': [
-                        '/PogoSafeMode',
-                      ],
-                    },
-                  },
-                }],
-                ['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 118 matching lines @@
               'dependencies': [
                 '../pdf/pdf.gyp:pdf',
               ],
             }],
           ],
         },  # target chrome_child_dll
       ],
     }],
   ],
 }