Cleanup: Remove unneeded forward declarations in webkit/.

webkit/quota/quota_temporary_storage_evictor.h

 // Copyright (c) 2011 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 WEBKIT_QUOTA_QUOTA_TEMPORARY_STORAGE_EVICTOR_H_
 #define WEBKIT_QUOTA_QUOTA_TEMPORARY_STORAGE_EVICTOR_H_
 #pragma once
 
 #include <map>
 #include <string>
 
 #include "base/memory/weak_ptr.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/timer.h"
 #include "webkit/quota/quota_types.h"
 
 class GURL;
 
-namespace base {
-class MessageLoopProxy;
-}
-
 namespace quota {
 
 class QuotaEvictionHandler;
 struct QuotaAndUsage;
 
 class QuotaTemporaryStorageEvictor : public base::NonThreadSafe {
  public:
   struct Statistics {
     Statistics()
         : num_errors_on_evicting_origin(0),
@@ skipping 99 matching lines @@
   base::OneShotTimer<QuotaTemporaryStorageEvictor> eviction_timer_;
   base::RepeatingTimer<QuotaTemporaryStorageEvictor> histogram_timer_;
   base::WeakPtrFactory<QuotaTemporaryStorageEvictor> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(QuotaTemporaryStorageEvictor);
 };
 
 }  // namespace quota
 
 #endif  // WEBKIT_QUOTA_QUOTA_TEMPORARY_STORAGE_EVICTOR_H_