Renamed FaviconHandlerDelegate to FaviconDriver.

components/favicon.gypi

 # Copyright 2014 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': 'favicon_core',
       'type': 'none',
       'sources': [
         'favicon/core/browser/favicon_client.h',
-        'favicon/core/favicon_handler_delegate.h',
+        'favicon/core/favicon_driver.h',
       ],
     },
   ],
 }