Cancel downloads earlier when prerendering.

chrome/browser/prerender/prerender_contents.h

 // Copyright (c) 2011 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_CONTENTS_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_CONTENTS_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/scoped_ptr.h"
 #include "base/time.h"
 #include "chrome/browser/prerender/prerender_final_status.h"
 #include "chrome/browser/prerender/prerender_render_view_host_observer.h"
 #include "chrome/browser/tab_contents/render_view_host_delegate_helper.h"
 #include "chrome/browser/ui/app_modal_dialogs/js_modal_dialog.h"
+#include "chrome/browser/ui/download/download_tab_helper_delegate.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/tab_contents/tab_contents_observer.h"
 #include "content/common/notification_registrar.h"
 #include "content/common/window_container_type.h"
 #include "webkit/glue/window_open_disposition.h"
 
 class RenderViewHost;
 class TabContents;
 class TabContentsWrapper;
 struct FaviconURL;
@@ skipping 16 matching lines @@
 // have any visible display. Its navigation is not managed by a
 // NavigationController because is has no facility for navigating (other than
 // programatically view window.location.href) or RenderViewHostManager because
 // it is never allowed to navigate across a SiteInstance boundary.
 // TODO(dominich): Remove RenderViewHostDelegate inheritance when UseTabContents
 // returns true by default.
 class PrerenderContents : public RenderViewHostDelegate,
                           public RenderViewHostDelegate::View,
                           public NotificationObserver,
                           public TabContentsObserver,
-                          public JavaScriptAppModalDialogDelegate {
+                          public JavaScriptAppModalDialogDelegate,
+                          public DownloadTabHelperDelegate {
  public:
   // PrerenderContents::Create uses the currently registered Factory to create
   // the PrerenderContents. Factory is intended for testing.
   class Factory {
    public:
     Factory() {}
     virtual ~Factory() {}
 
     virtual PrerenderContents* CreatePrerenderContents(
         PrerenderManager* prerender_manager,
@@ skipping 146 matching lines @@
   virtual TabContents* AsTabContents() OVERRIDE;
   virtual ExtensionHost* AsExtensionHost() OVERRIDE;
 
   virtual void UpdateInspectorSetting(const std::string& key,
                                       const std::string& value) OVERRIDE;
   virtual void ClearInspectorSettings() OVERRIDE;
 
   virtual void RendererUnresponsive(RenderViewHost* render_view_host,
                                     bool is_during_unload) OVERRIDE;
 
+  // DownloadTabHelperDelegate implementation.
+  virtual bool CanDownload(int request_id) OVERRIDE;
+  virtual void OnStartDownload(DownloadItem* download,
+                               TabContentsWrapper* tab) OVERRIDE;
+
   // Adds an alias URL, for one of the many redirections. If the URL can not
   // be prerendered - for example, it's an ftp URL - |this| will be destroyed
   // and false is returned. Otherwise, true is returned and the alias is
   // remembered.
   bool AddAliasURL(const GURL& url);
 
   // The preview TabContents (may be null).
   TabContentsWrapper* prerender_contents() const {
     return prerender_contents_.get();
   }
@@ skipping 117 matching lines @@
   // These are -1 before a RenderView is created.
   int child_id_;
   int route_id_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderContents);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_CONTENTS_H_