Add missing off_the_record_profile_impl.h to .gyp file.

chrome/chrome_browser.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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
@@ skipping 1867 matching lines @@
         'browser/process_singleton_mac.cc',
         'browser/process_singleton_win.cc',
         'browser/profiles/avatar_menu_model.cc',
         'browser/profiles/avatar_menu_model.h',
         'browser/profiles/avatar_menu_model_observer.h',
         'browser/profiles/chrome_version_service.cc',
         'browser/profiles/chrome_version_service.h',
         'browser/profiles/gaia_info_update_service.cc',
         'browser/profiles/gaia_info_update_service.h',
         'browser/profiles/off_the_record_profile_impl.cc',
+        'browser/profiles/off_the_record_profile_impl.h',
         'browser/profiles/off_the_record_profile_io_data.cc',
         'browser/profiles/off_the_record_profile_io_data.h',
         'browser/profiles/profile.cc',
         'browser/profiles/profile.h',
         'browser/profiles/profile_dependency_manager.cc',
         'browser/profiles/profile_dependency_manager.h',
         'browser/profiles/profile_destroyer.cc',
         'browser/profiles/profile_destroyer.h',
         'browser/profiles/profile_downloader.cc',
         'browser/profiles/profile_downloader.h',
@@ skipping 3475 matching lines @@
         'browser/metrics/proto/study.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/metrics/proto',
         'proto_out_dir': 'chrome/browser/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }