Refactor sudden termination

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index e4f2901a32959a0b3d03a73ca3d5e8e76a896f4d..c75183221a3e32068e6cae3f8f9d285f51506149 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -519,6 +519,9 @@ class CONTENT_EXPORT RenderFrameImpl
   virtual void didChangeManifest(blink::WebLocalFrame*);
   virtual bool enterFullscreen();
   virtual bool exitFullscreen();
+  void suddenTerminationDisablerChanged(
+      bool present,
+      blink::WebFrameClient::SuddenTerminationDisablerType type) override;
 
   // WebMediaPlayerDelegate implementation:
   void DidPlay(blink::WebMediaPlayer* player) override;
@@ -862,6 +865,11 @@ class CONTENT_EXPORT RenderFrameImpl
   // AccessibilityModeOff.
   RendererAccessibility* renderer_accessibility_;
 
+  // Used to track disablers of sudden termination. A change of presence of any
+  // of those elements should be transmitted to the browser.
+  bool beforeunload_handlers_present_;
+  bool unload_handlers_present_;
+
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
   // The external popup for the currently showing select popup.
   scoped_ptr<ExternalPopupMenu> external_popup_menu_;