Makes instant run before unload listeners.

chrome/browser/tab_contents/tab_contents.h

Index: chrome/browser/tab_contents/tab_contents.h
diff --git a/chrome/browser/tab_contents/tab_contents.h b/chrome/browser/tab_contents/tab_contents.h
index e93ddeb7e68fdd229114afd2d0a6c617c2e8e834..357601bff914a5da3df6c238e8c2529cb61702ff 100644
--- a/chrome/browser/tab_contents/tab_contents.h
+++ b/chrome/browser/tab_contents/tab_contents.h
@@ -345,6 +345,12 @@ class TabContents : public PageNavigator,
   virtual void ShowContents();
   virtual void HideContents();
 
+  // Returns true if the before unload and unload listeners need to be
+  // fired. The value of this changes over time. For example, if true and the
+  // before unload listener is executed and allows the user to exit, then this
+  // returns false.
+  bool NeedToFireBeforeUnload();
+
 #ifdef UNIT_TEST
   // Expose the render manager for testing.
   RenderViewHostManager* render_manager() { return &render_manager_; }