Clean up ResourceHandler API.

content/browser/loader/layered_resource_handler.h

 // Copyright (c) 2012 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_LOADER_LAYERED_RESOURCE_HANDLER_H_
 #define CONTENT_BROWSER_LOADER_LAYERED_RESOURCE_HANDLER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/loader/resource_handler.h"
 #include "content/common/content_export.h"
 
+namespace net {
+class URLRequest;
+}  // namespace net
+
 namespace content {
 
 // A ResourceHandler that simply delegates all calls to a next handler.  This
 // class is intended to be subclassed.
 class CONTENT_EXPORT LayeredResourceHandler : public ResourceHandler {
  public:
-  explicit LayeredResourceHandler(scoped_ptr<ResourceHandler> next_handler);
+  LayeredResourceHandler(net::URLRequest* request,
+                         scoped_ptr<ResourceHandler> next_handler);
   virtual ~LayeredResourceHandler();
 
   // ResourceHandler implementation:
   virtual void SetController(ResourceController* controller) OVERRIDE;
   virtual bool OnUploadProgress(int request_id, uint64 position,
                                 uint64 size) OVERRIDE;
   virtual bool OnRequestRedirected(int request_id, const GURL& url,
                                    ResourceResponse* response,
                                    bool* defer) OVERRIDE;
   virtual bool OnResponseStarted(int request_id,
                                  ResourceResponse* response,
                                  bool* defer) OVERRIDE;
   virtual bool OnWillStart(int request_id, const GURL& url,
                            bool* defer) OVERRIDE;
-  virtual bool OnWillRead(int request_id, net::IOBuffer** buf, int* buf_size,
+  virtual bool OnWillRead(int request_id,
+                          scoped_refptr<net::IOBuffer>* buf,
+                          int* buf_size,
                           int min_size) OVERRIDE;
   virtual bool OnReadCompleted(int request_id, int bytes_read,
                                bool* defer) OVERRIDE;
   virtual bool OnResponseCompleted(int request_id,
                                    const net::URLRequestStatus& status,
                                    const std::string& security_info) OVERRIDE;
   virtual void OnDataDownloaded(int request_id, int bytes_downloaded) OVERRIDE;
 
   scoped_ptr<ResourceHandler> next_handler_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_LAYERED_RESOURCE_HANDLER_H_