Refactor 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 <memory>
 
 #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:
   LayeredResourceHandler(net::URLRequest* request,
                          std::unique_ptr<ResourceHandler> next_handler);
   ~LayeredResourceHandler() override;
 
   // ResourceHandler implementation:
   void SetController(ResourceController* controller) override;
-  bool OnRequestRedirected(const net::RedirectInfo& redirect_info,
+  void OnRequestRedirected(const net::RedirectInfo& redirect_info,
                            ResourceResponse* response,
-                           bool* defer) override;
-  bool OnResponseStarted(ResourceResponse* response, bool* defer) override;
-  bool OnWillStart(const GURL& url, bool* defer) override;
+                           bool* defer_or_cancel) override;
+  void OnResponseStarted(ResourceResponse* response,
+                         bool* defer_or_cancel) override;
+  void OnWillStart(const GURL& url, bool* defer_or_cancel) override;
   bool OnWillRead(scoped_refptr<net::IOBuffer>* buf,
                   int* buf_size,
                   int min_size) override;
-  bool OnReadCompleted(int bytes_read, bool* defer) override;
+  void OnReadCompleted(int bytes_read, bool* defer_or_cancel) override;
   void OnResponseCompleted(const net::URLRequestStatus& status,
                            bool* defer) override;
   void OnDataDownloaded(int bytes_downloaded) override;
 
   std::unique_ptr<ResourceHandler> next_handler_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_LAYERED_RESOURCE_HANDLER_H_