Don't leave renderer process frozen when canceling JavaScript dialogs.

content/browser/web_contents/web_contents_impl.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_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 475 matching lines @@
   // RenderViewHostManager::Delegate -------------------------------------------
 
   virtual bool CreateRenderViewForRenderManager(
       RenderViewHost* render_view_host, int opener_route_id) OVERRIDE;
   virtual void BeforeUnloadFiredFromRenderManager(
       bool proceed, const base::TimeTicks& proceed_time,
       bool* proceed_to_fire_unload) OVERRIDE;
   virtual void RenderProcessGoneFromRenderManager(
       RenderViewHost* render_view_host) OVERRIDE;
   virtual void UpdateRenderViewSizeForRenderManager() OVERRIDE;
+  virtual void CancelModalDialogsForRenderManager() OVERRIDE;
   virtual void NotifySwappedFromRenderManager(
       RenderViewHost* old_render_view_host) OVERRIDE;
   virtual int CreateOpenerRenderViewsForRenderManager(
       SiteInstance* instance) OVERRIDE;
   virtual NavigationControllerImpl&
       GetControllerForRenderManager() OVERRIDE;
   virtual WebUIImpl* CreateWebUIForRenderManager(const GURL& url) OVERRIDE;
   virtual NavigationEntry*
       GetLastCommittedNavigationEntryForRenderManager() OVERRIDE;
   virtual bool FocusLocationBarByDefault() OVERRIDE;
@@ skipping 464 matching lines @@
   // Maps the ids of pending image downloads to their callbacks
   typedef std::map<int, ImageDownloadCallback> ImageDownloadMap;
   ImageDownloadMap image_download_map_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_