Fix nits in content/browser/appcache/

content/browser/appcache/appcache_storage_impl.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 CONTENT_BROWSER_APPCACHE_APPCACHE_STORAGE_IMPL_H_
 #define CONTENT_BROWSER_APPCACHE_APPCACHE_STORAGE_IMPL_H_
 
 #include <deque>
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "content/browser/appcache/appcache_database.h"
 #include "content/browser/appcache/appcache_disk_cache.h"
 #include "content/browser/appcache/appcache_storage.h"
 #include "content/common/content_export.h"
 
 namespace content {
 class AppCacheStorageImplTest;
 class ChromeAppCacheServiceTest;
-}
-
-namespace content {
 
 class AppCacheStorageImpl : public AppCacheStorage {
  public:
   explicit AppCacheStorageImpl(AppCacheServiceImpl* service);
   virtual ~AppCacheStorageImpl();
 
   void Initialize(const base::FilePath& cache_directory,
                   base::MessageLoopProxy* db_thread,
                   base::MessageLoopProxy* cache_thread);
   void Disable();
@@ skipping 133 matching lines @@
   std::deque<base::Closure> pending_simple_tasks_;
   base::WeakPtrFactory<AppCacheStorageImpl> weak_factory_;
 
   friend class content::AppCacheStorageImplTest;
   friend class content::ChromeAppCacheServiceTest;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_STORAGE_IMPL_H_