content: Cleanup class/struct forward declarations

content/browser/media/android/media_resource_getter_impl.h

 // Copyright 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 CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_RESOURCE_GETTER_IMPL_H_
 #define CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_RESOURCE_GETTER_IMPL_H_
 
 #include <jni.h>
 #include <stdint.h>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/synchronization/waitable_event.h"
 #include "media/base/android/media_resource_getter.h"
 #include "media/base/android/media_url_interceptor.h"
 #include "net/base/auth.h"
 #include "net/cookies/canonical_cookie.h"
 
 namespace storage {
 class FileSystemContext;
 }
 
-namespace net {
-class URLRequestContextGetter;
-}
-
 namespace content {
 
 class BrowserContext;
 class ResourceContext;
 
 // This class implements media::MediaResourceGetter to retrieve resources
 // asynchronously on the UI thread.
 class MediaResourceGetterImpl : public media::MediaResourceGetter {
  public:
   // Construct a MediaResourceGetterImpl object. |browser_context| and
@@ skipping 51 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<MediaResourceGetterImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaResourceGetterImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_RESOURCE_GETTER_IMPL_H_