Make PrerenderTracker's resource_throttle_io_thread_map_ use RenderFrame IDs instead of RenderView …

chrome/browser/prerender/prerender_resource_throttle.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 CHROME_BROWSER_PRERENDER_PRERENDER_RESOURCE_THROTTLE_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_RESOURCE_THROTTLE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "content/public/browser/resource_throttle.h"
 #include "webkit/common/resource_type.h"
 
 namespace net {
 class URLRequest;
 }
 
 namespace prerender {
 class PrerenderContents;
-class PrerenderTracker;
 
 // This class implements policy on resource requests in prerenders.  It cancels
 // prerenders on certain requests.  It also defers certain requests until after
 // the prerender is swapped in.
 //
 // TODO(davidben): Experiment with deferring network requests that
 // would otherwise cancel the prerender.
 class PrerenderResourceThrottle
     : public content::ResourceThrottle,
       public base::SupportsWeakPtr<PrerenderResourceThrottle> {
  public:
-  PrerenderResourceThrottle(net::URLRequest* request,
-                            PrerenderTracker* tracker);
+  explicit PrerenderResourceThrottle(net::URLRequest* request);
 
   // content::ResourceThrottle implementation:
   virtual void WillStartRequest(bool* defer) OVERRIDE;
   virtual void WillRedirectRequest(const GURL& new_url, bool* defer) OVERRIDE;
   virtual const char* GetNameForLogging() const OVERRIDE;
 
-  // Called by the PrerenderTracker when a prerender becomes visible.
+  // Called by the PrerenderContents when a prerender becomes visible.
   // May only be called if currently throttling the resource.
   void Resume();
 
-  // Called by the PrerenderTracker when a prerender is destroyed.
-  // May only be called if currently throttling the resource.
-  void Cancel();
-
   static void OverridePrerenderContentsForTesting(PrerenderContents* contents);
 
  private:
+  // Helper method to cancel the request. May only be called if currently
+  // throttling the resource.
+  void Cancel();
+
   static void WillStartRequestOnUI(
       const base::WeakPtr<PrerenderResourceThrottle>& throttle,
       const std::string& method,
       int render_process_id,
       int render_frame_id,
       const GURL& url);
 
   static void WillRedirectRequestOnUI(
       const base::WeakPtr<PrerenderResourceThrottle>& throttle,
       const std::string& follow_only_when_prerender_shown_header,
       ResourceType::Type resource_type,
       bool async,
       int render_process_id,
       int render_frame_id,
       const GURL& new_url);
 
   // Helper to return the PrerenderContents given a render frame id. May return
   // NULL if it's gone.
   static PrerenderContents* PrerenderContentsFromRenderFrame(
       int render_process_id, int render_frame_id);
 
-  // Helper method to call tracker_->AddResourceThrottleOnIOThread.
-  void AddResourceThrottle();
-
   net::URLRequest* request_;
-  PrerenderTracker* tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderResourceThrottle);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_RESOURCE_THROTTLE_H_