Removed NOTIFICATION_BROWSER_CLOSING notification

chrome/browser/chrome_notification_types.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROME_NOTIFICATION_TYPES_H_
 #define CHROME_BROWSER_CHROME_NOTIFICATION_TYPES_H_
 
 #include "build/build_config.h"
 #include "extensions/features/features.h"
 
@@ skipping 22 matching lines @@
   // This message is sent after a window has been opened.  The source is a
   // Source<Browser> containing the affected Browser.  No details are
   // expected.
   NOTIFICATION_BROWSER_OPENED = NOTIFICATION_CHROME_START,
 
   // This message is sent soon after BROWSER_OPENED, and indicates that
   // the Browser's |window_| is now non-NULL. The source is a Source<Browser>
   // containing the affected Browser.  No details are expected.
   NOTIFICATION_BROWSER_WINDOW_READY,
 
-  // This message is sent when a browser is closing. The source is a
-  // Source<Browser> containing the affected Browser. No details are expected.
-  // This is sent prior to BROWSER_CLOSED, and may be sent more than once for a
-  // particular browser.
-  NOTIFICATION_BROWSER_CLOSING,
-
   // This message is sent after a window has been closed.  The source is a
   // Source<Browser> containing the affected Browser.  No details are exptected.
   NOTIFICATION_BROWSER_CLOSED,
 
   // This message is sent when closing a browser has been cancelled, either by
   // the user cancelling a beforeunload dialog, or IsClosingPermitted()
   // disallowing closing. This notification implies that no BROWSER_CLOSING or
   // BROWSER_CLOSED notification will be sent.
   // The source is a Source<Browser> containing the affected browser. No details
   // are expected.
@@ skipping 410 matching lines @@
   // Note:-
   // Currently only Content and Chrome define and use notifications.
   // Custom notifications not belonging to Content and Chrome should start
   // from here.
   NOTIFICATION_CHROME_END,
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_CHROME_NOTIFICATION_TYPES_H_