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 b66a6cd532da0b63a0e5f099a1b702a21aab5cee..ea20b8d5d33fc41ca09b760917ead0dbc80d15dd 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -419,6 +419,11 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   void SetShouldAutoResize(bool enable);
 
  protected:
+  // Expose increment/decrement of the in-flight event count, so
+  // RenderViewHostImpl can account for in-flight beforeunload/unload events.
+  int increment_in_flight_event_count() { return ++in_flight_event_count_; }
+  int decrement_in_flight_event_count() { return --in_flight_event_count_; }
+
   // The View associated with the RenderViewHost. The lifetime of this object
   // is associated with the lifetime of the Render process. If the Renderer
   // crashes, its View is destroyed and this pointer becomes NULL, even though