[Offline Pages] Make prerenderer notify us of network progress.

chrome/browser/prerender/prerender_handle.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 CHROME_BROWSER_PRERENDER_PRERENDER_HANDLE_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_HANDLE_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 20 matching lines @@
 
     // Signals that the prerender has had its load event.
     virtual void OnPrerenderStopLoading(PrerenderHandle* handle) = 0;
 
     // Signals that the prerender has had its 'DOMContentLoaded' event.
     virtual void OnPrerenderDomContentLoaded(PrerenderHandle* handle) = 0;
 
     // Signals that the prerender has stopped running.
     virtual void OnPrerenderStop(PrerenderHandle* handle) = 0;
 
+    // Signals that a resource finished loading and altered the running byte
+    // count.
+    virtual void OnPrerenderNetworkBytesChanged(PrerenderHandle* handle) = 0;
+
    protected:
     Observer();
     virtual ~Observer();
   };
 
   // Before calling the destructor, the caller must invalidate the handle by
   // calling either OnNavigateAway or OnCancel.
   ~PrerenderHandle() override;
 
   void SetObserver(Observer* observer);
@@ skipping 28 matching lines @@
   friend class PrerenderManager;
 
   explicit PrerenderHandle(PrerenderManager::PrerenderData* prerender_data);
 
   // From PrerenderContents::Observer:
   void OnPrerenderStart(PrerenderContents* prerender_contents) override;
   void OnPrerenderStopLoading(PrerenderContents* prerender_contents) override;
   void OnPrerenderDomContentLoaded(
       PrerenderContents* prerender_contents) override;
   void OnPrerenderStop(PrerenderContents* prerender_contents) override;
+  void OnPrerenderNetworkBytesChanged(
+      PrerenderContents* prerender_contents) override;
 
   Observer* observer_;
 
   base::WeakPtr<PrerenderManager::PrerenderData> prerender_data_;
   base::WeakPtrFactory<PrerenderHandle> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderHandle);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_HANDLE_H_