Fix nits in content/browser/appcache/

content/browser/appcache/view_appcache_internals_job.h

 // 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.
 
 #ifndef CONTENT_BROWSER_APPCACHE_VIEW_APPCACHE_INTERNALS_JOB_H_
 #define CONTENT_BROWSER_APPCACHE_VIEW_APPCACHE_INTERNALS_JOB_H_
 
 #include "base/basictypes.h"
 
 namespace net {
 class NetworkDelegate;
 class URLRequest;
 class URLRequestJob;
 }
 
 namespace content {
 class AppCacheServiceImpl;
-}
-
-namespace content {
 
 class ViewAppCacheInternalsJobFactory {
  public:
   static net::URLRequestJob* CreateJobForRequest(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate,
       AppCacheServiceImpl* service);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ViewAppCacheInternalsJobFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_VIEW_APPCACHE_INTERNALS_JOB_H_