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 3decd78c85acd9f27ffa516f27d04656ea172c0a..0c592618e6cf34f8fdb3e94ad40ef12e415ed2b8 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -510,6 +510,9 @@ class CONTENT_EXPORT RenderFrameImpl
   virtual void didChangeManifest(blink::WebLocalFrame*);
   virtual bool enterFullscreen();
   virtual bool exitFullscreen();
+  void suddenTerminationDisablerChanged(
+      int variation,
+      blink::WebFrameClient::SuddenTerminationDisablerType type) override;
 
   // WebMediaPlayerDelegate implementation:
   void DidPlay(blink::WebMediaPlayer* player) override;
@@ -846,6 +849,11 @@ 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.
+  int beforeunload_handlers_;
+  int unload_handlers_;
+
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
   // The external popup for the currently showing select popup.
   scoped_ptr<ExternalPopupMenu> external_popup_menu_;