Cleanup: IWYU for base/gtest_prod_util.h.

components/sync_driver/favicon_cache.h

 // Copyright (c) 2013 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.
 
 #ifndef COMPONENTS_SYNC_DRIVER_FAVICON_CACHE_H_
 #define COMPONENTS_SYNC_DRIVER_FAVICON_CACHE_H_
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/gtest_prod_util.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/scoped_observer.h"
 #include "base/task/cancelable_task_tracker.h"
 #include "components/history/core/browser/history_service_observer.h"
 #include "components/history/core/browser/history_types.h"
 #include "components/sessions/core/session_id.h"
@@ skipping 217 matching lines @@
 
   // Weak pointer factory for favicon loads.
   base::WeakPtrFactory<FaviconCache> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FaviconCache);
 };
 
 }  // namespace browser_sync
 
 #endif  // COMPONENTS_SYNC_DRIVER_FAVICON_CACHE_H_