components: Cleanup class/struct fwd declarations

components/sync/engine/fake_sync_manager.h

 // 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.
 
 #ifndef COMPONENTS_SYNC_ENGINE_FAKE_SYNC_MANAGER_H_
 #define COMPONENTS_SYNC_ENGINE_FAKE_SYNC_MANAGER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "components/sync/engine/sync_manager.h"
 #include "components/sync/syncable/test_user_share.h"
 
-class GURL;
-
 namespace base {
 class SequencedTaskRunner;
 }
 
 namespace syncer {
 
 class FakeSyncEncryptionHandler;
 
 class FakeSyncManager : public SyncManager {
  public:
@@ skipping 121 matching lines @@
 
   // Number of invalidations received since startup.
   int num_invalidations_received_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeSyncManager);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_FAKE_SYNC_MANAGER_H_