Makes instant run before unload listeners.

chrome/browser/tab_contents/tab_contents_delegate.h

Index: chrome/browser/tab_contents/tab_contents_delegate.h
diff --git a/chrome/browser/tab_contents/tab_contents_delegate.h b/chrome/browser/tab_contents/tab_contents_delegate.h
index 4f240982092d8dddd86b84883acead5aff87d2e6..162a120ab042db385d8b829551841541cd320f42 100644
--- a/chrome/browser/tab_contents/tab_contents_delegate.h
+++ b/chrome/browser/tab_contents/tab_contents_delegate.h
@@ -154,6 +154,9 @@ class TabContentsDelegate : public AutomationResourceRoutingDelegate {
   virtual void ShowHtmlDialog(HtmlDialogUIDelegate* delegate,
                               gfx::NativeWindow parent_window);
 
+  // Invoked prior to showing before unload handler confirmation dialog.

[Charlie Reis, 2010/12/08 01:26:12]

What about unload handlers?  Or is that a TODO?

[sky, 2010/12/08 03:04:22]

No, this is only invoked for 'before unload' handler. I don't need to know about
any unload messages (I'm just suppressing them, which seems ok in this case).

+  virtual void WillRunBeforeUnloadConfirm();
+
   // Returns true if javascript dialogs and unload alerts are suppressed.
   // Default is false.
   virtual bool ShouldSuppressDialogs();