AssociatedURLLoader shouldn't derive from WebURLLoader

media/blink/active_loader.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 MEDIA_BLINK_ACTIVE_LOADER_H_
 #define MEDIA_BLINK_ACTIVE_LOADER_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "media/blink/media_blink_export.h"
 
 namespace blink {
-class WebURLLoader;
+class WebAssociatedURLLoader;
 }
 
 namespace media {
 
 // Wraps an active WebURLLoader with some additional state.
 //
 // Handles deferring and deletion of loaders.
 class MEDIA_BLINK_EXPORT ActiveLoader {
  public:
   // Creates an ActiveLoader with the given loader. It is assumed that the
   // initial state of |loader| is loading and not deferred.
-  explicit ActiveLoader(std::unique_ptr<blink::WebURLLoader> loader);
+  explicit ActiveLoader(std::unique_ptr<blink::WebAssociatedURLLoader> loader);
   ~ActiveLoader();
 
   // Starts or stops deferring the resource load.
   void SetDeferred(bool deferred);
   bool deferred() { return deferred_; }
 
  private:
   friend class MultibufferDataSourceTest;
 
-  std::unique_ptr<blink::WebURLLoader> loader_;
+  std::unique_ptr<blink::WebAssociatedURLLoader> loader_;
   bool deferred_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ActiveLoader);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_ACTIVE_LOADER_H_