Merge 68646 - Makes instant run before unload listeners....

chrome/browser/tab_contents/tab_contents_delegate.h

Index: chrome/browser/tab_contents/tab_contents_delegate.h
===================================================================
--- chrome/browser/tab_contents/tab_contents_delegate.h	(revision 68655)
+++ chrome/browser/tab_contents/tab_contents_delegate.h	(working copy)
@@ -158,6 +158,9 @@
   virtual void ShowHtmlDialog(HtmlDialogUIDelegate* delegate,
                               gfx::NativeWindow parent_window);
 
+  // Invoked prior to showing before unload handler confirmation dialog.
+  virtual void WillRunBeforeUnloadConfirm();
+
   // Returns true if javascript dialogs and unload alerts are suppressed.
   // Default is false.
   virtual bool ShouldSuppressDialogs();