Quickly close tabs/window with long-running unload handlers.

chrome/browser/ui/browser.h

Index: chrome/browser/ui/browser.h
diff --git a/chrome/browser/ui/browser.h b/chrome/browser/ui/browser.h
index a8f7331a6ab3d7de34c8e98edf232bba6b376642..808ffa100ffe99e92b29719136f05025de5fcb7a 100644
--- a/chrome/browser/ui/browser.h
+++ b/chrome/browser/ui/browser.h
@@ -293,6 +293,13 @@ class Browser : public TabStripModelObserver,
   // Gives beforeunload handlers the chance to cancel the close.
   bool ShouldCloseWindow();
 
+  // Figure out if there are tabs that have beforeunload handlers.
+  // It starts beforeunload/unload processing as a side-effect.
+  bool TabsNeedBeforeUnloadFired();
+
+  // Returns true if all tabs' beforeunload/unload events have fired.
+  bool HasCompletedUnloadProcessing() const;
+
   bool IsAttemptingToCloseBrowser() const;
 
   // Invoked when the window containing us is closing. Performs the necessary
@@ -430,9 +437,6 @@ class Browser : public TabStripModelObserver,
       content::WebContents* source,
       const content::NativeWebKeyboardEvent& event) OVERRIDE;
 
-  // Figure out if there are tabs that have beforeunload handlers.
-  bool TabsNeedBeforeUnloadFired();
-
   bool is_type_tabbed() const { return type_ == TYPE_TABBED; }
   bool is_type_popup() const { return type_ == TYPE_POPUP; }