Fix DCHECK when opening two password bubbles one after another.

chrome/browser/ui/cocoa/passwords/passwords_bubble_cocoa.h

 // Copyright 2014 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_UI_COCOA_PASSWORDS_PASSWORDS_BUBBLE_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_PASSWORDS_PASSWORDS_BUBBLE_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
 #import "chrome/browser/ui/passwords/manage_passwords_bubble_model.h"
 
 namespace content {
 class WebContents;
 }
 
 @class ManagePasswordsBubbleController;
 @class ManagePasswordsBubbleCocoaNotificationBridge;
 class ManagePasswordsIcon;
 
 // Cocoa implementation of the platform-independent password bubble interface.
 class ManagePasswordsBubbleCocoa {
  public:
   // Creates and shows the bubble, which owns itself. Does nothing if the bubble
   // is already shown.
   static void Show(content::WebContents* webContents, bool user_action);
 
   // Closes and deletes the bubble.
-  void Close();
+  void Close(bool no_animation = false);
 
   // Sets the location bar icon that should be updated with state changes.
   void SetIcon(ManagePasswordsIcon* icon) { icon_ = icon; }
 
   // Accessor for the global bubble.
   static ManagePasswordsBubbleCocoa* instance() { return bubble_; }
 
  private:
   friend class ManagePasswordsBubbleCocoaTest;
   friend class ManagePasswordsBubbleTest;
 
   // Instance-specific logic. Clients should use the static interface.
   ManagePasswordsBubbleCocoa(
       content::WebContents* webContents,
       ManagePasswordsBubbleModel::DisplayReason displayReason,
       ManagePasswordsIcon* icon);
   ~ManagePasswordsBubbleCocoa();
   void Show(bool user_action);
 
   // Cleans up state and deletes itself. Called when the bubble is closed.
   void OnClose();
 
   ManagePasswordsBubbleModel model_;
 
   // The location bar icon corresponding to the bubble.
   ManagePasswordsIcon* icon_;
 
-  // Whether there is currently a close operation taking place. Prevents
-  // multiple attempts to close the window.
-  bool closing_;
-
   // The view controller for the bubble. Weak; owns itself. Must be nilled
   // after the bubble is closed.
   ManagePasswordsBubbleController* controller_;
 
   // WebContents on which the bubble should be displayed. Weak.
   content::WebContents* webContents_;
 
   // Listens for NSNotificationCenter notifications.
   base::scoped_nsobject<ManagePasswordsBubbleCocoaNotificationBridge> bridge_;
 
   // The global bubble instance. Deleted by Close().
   static ManagePasswordsBubbleCocoa* bubble_;
 
   DISALLOW_COPY_AND_ASSIGN(ManagePasswordsBubbleCocoa);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_PASSWORDS_PASSWORDS_BUBBLE_COCOA_H_