Fixing a problem, where a hung renderer process is not killed when navigating away

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index 207a37bdcc8ae86ead60efe3fafd2903e2ea34ea..ce403e174ec905d0f9580c0a263b48bab57efb66 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -202,8 +202,10 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   void StartHangMonitorTimeout(base::TimeDelta delay);
 
   // Stops all existing hang monitor timeouts and assumes the renderer is
-  // responsive.
-  void StopHangMonitorTimeout();
+  // responsive. It is virtual so RenderViewHost can make a decision whether
+  // the timer should be stopped, to avoid stopping it during cross site
+  // navigation.
+  virtual void StopHangMonitorTimeout();
 
   // Forwards the given message to the renderer. These are called by the view
   // when it has received a message.