Fix for 'Simple Adblock' extension crashes

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 419 matching lines @@
                                  const gfx::Rect& initial_pos,
                                  bool user_gesture) OVERRIDE;
   virtual void ShowCreatedWidget(int route_id,
                                  const gfx::Rect& initial_pos) OVERRIDE;
   virtual void ShowCreatedFullscreenWidget(int route_id) OVERRIDE;
   virtual void RequestMediaAccessPermission(
       const MediaStreamRequest& request,
       const MediaResponseCallback& callback) OVERRIDE;
   virtual SessionStorageNamespace* GetSessionStorageNamespace(
       SiteInstance* instance) OVERRIDE;
+  virtual SessionStorageNamespaceMap GetSessionStorageNamespaceMap() OVERRIDE;
   virtual FrameTree* GetFrameTree() OVERRIDE;
   virtual void AccessibilityEventReceived(
       const std::vector<AXEventNotificationDetails>& details) OVERRIDE;
 
   // NavigatorDelegate ---------------------------------------------------------
 
   virtual void DidStartProvisionalLoad(
       RenderFrameHostImpl* render_frame_host,
       int parent_routing_id,
       const GURL& validated_url,
@@ skipping 676 matching lines @@
   bool last_dialog_suppressed_;
 
   scoped_ptr<GeolocationDispatcherHost> geolocation_dispatcher_host_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_