Fix for 'Simple Adblock' extension crashes

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index a0be1cf20a767c45a6879480478f803a08432735..e0e4f5be283a94ea240c86174f5eed8908cef2b6 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -17,6 +17,7 @@
 #include "content/browser/power_monitor_message_broadcaster.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/gpu_data_manager_observer.h"
+#include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/render_process_host.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ipc/ipc_platform_file.h"
@@ -170,6 +171,11 @@ class CONTENT_EXPORT RenderProcessHostImpl
   scoped_refptr<ScreenOrientationDispatcherHost>
       screen_orientation_dispatcher_host() const;
 
+  // Used to extend the lifetime of the sessions until the render view
+  // in the renderer is fully closed.
+  void ReleaseOnCloseAck(const SessionStorageNamespaceMap& sessions,
+                         int view_route_id);
+
   // Register/unregister the host identified by the host id in the global host
   // list.
   static void RegisterHost(int host_id, RenderProcessHost* host);
@@ -280,6 +286,7 @@ class CONTENT_EXPORT RenderProcessHostImpl
   void SuddenTerminationChanged(bool enabled);
   void OnUserMetricsRecordAction(const std::string& action);
   void OnSavedPageAsMHTML(int job_id, int64 mhtml_file_size);
+  void OnCloseACK(int old_route_id);
 
   // CompositorSurfaceBuffersSwapped handler when there's no RWH.
   void OnCompositorSurfaceBuffersSwappedNoHost(
@@ -423,6 +430,9 @@ class CONTENT_EXPORT RenderProcessHostImpl
   // Records the time when the process starts surviving for workers for UMA.
   base::TimeTicks survive_for_worker_start_time_;
 
+  std::map<int, SessionStorageNamespaceMap>
+      session_storage_namespaces_awaiting_close_;
+
   base::WeakPtrFactory<RenderProcessHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);