Introduce WebViewGuestDelegate.

chrome/chrome_browser.gypi

 # Copyright 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': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 1489 matching lines @@
       'browser/guest_view/app_view/app_view_constants.cc',
       'browser/guest_view/app_view/app_view_constants.h',
       'browser/guest_view/app_view/app_view_guest.cc',
       'browser/guest_view/app_view/app_view_guest.h',
       'browser/guest_view/extension_options/extension_options_constants.cc',
       'browser/guest_view/extension_options/extension_options_constants.h',
       'browser/guest_view/extension_options/extension_options_guest.cc',
       'browser/guest_view/extension_options/extension_options_guest.h',
       'browser/guest_view/web_view/chrome_web_view_permission_helper_delegate.cc',
       'browser/guest_view/web_view/chrome_web_view_permission_helper_delegate.h',
+      'browser/guest_view/web_view/chrome_web_view_guest_delegate.cc',
+      'browser/guest_view/web_view/chrome_web_view_guest_delegate.h',
       'browser/guest_view/web_view/context_menu_content_type_web_view.cc',
       'browser/guest_view/web_view/context_menu_content_type_web_view.h',
       'browser/guest_view/web_view/javascript_dialog_helper.cc',
       'browser/guest_view/web_view/javascript_dialog_helper.h',
       'browser/guest_view/web_view/web_view_constants.cc',
       'browser/guest_view/web_view/web_view_constants.h',
       'browser/guest_view/web_view/web_view_find_helper.cc',
       'browser/guest_view/web_view/web_view_find_helper.h',
       'browser/guest_view/web_view/web_view_guest.cc',
       'browser/guest_view/web_view/web_view_guest.h',
@@ skipping 2114 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }