Add Browser::SkipCallBeforeUnload so that the browser windows can be closed regardless of beforeunl…

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 e321e5d1324a306c5c9797713672d6fe5851ba1f..be615d9a19ea3af33449d5efa229e1138cdf0961 100644
--- a/chrome/browser/ui/browser.h
+++ b/chrome/browser/ui/browser.h
@@ -317,25 +317,26 @@ class Browser : public TabStripModelObserver,
 
   // Gives beforeunload handlers the chance to cancel the close. Returns whether
   // to proceed with the close. If called while the process begun by
-  // CallBeforeUnloadHandlers is in progress, returns false without taking
-  // action.
+  // TryToCloseWindow is in progress, returns false without taking action.
   bool ShouldCloseWindow();
 
   // Begins the process of confirming whether the associated browser can be
   // closed. If there are no tabs with beforeunload handlers it will immediately
   // return false. Otherwise, it starts prompting the user, returns true and
-  // will call |on_close_confirmed| with the result of the user's decision.
+  // will call |on_close_confirmed| with the result of the user's decision. If
+  // |skip_before_unload_event| is true, beforeunload handlers will be skipped
+  // and window closing will be confirmed without showing the prompting.

[sky, 2017/02/13 23:12:53]

prompting -> prompt

   // After calling this function, if the window will not be closed, call
   // ResetBeforeUnloadHandlers() to reset all beforeunload handlers; calling
   // this function multiple times without an intervening call to
-  // ResetBeforeUnloadHandlers() will run only the beforeunload handlers
+  // ResetTryToCloseWindow() will run only the beforeunload handlers
   // registered since the previous call.
-  bool CallBeforeUnloadHandlers(
-      const base::Callback<void(bool)>& on_close_confirmed);
+  bool TryToCloseWindow(bool skip_before_unload_event,
+                        const base::Callback<void(bool)>& on_close_confirmed);
 
   // Clears the results of any beforeunload confirmation dialogs triggered by a
-  // CallBeforeUnloadHandlers call.
-  void ResetBeforeUnloadHandlers();
+  // TryToCloseWindow call.
+  void ResetTryToCloseWindow();
 
   // Figure out if there are tabs that have beforeunload handlers.
   // It starts beforeunload/unload processing as a side-effect.