Remove dangling ManagePasswordsBubbleModel pointers. Test that different password bubbles don't pin…

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

 // Copyright 2016 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_PASSWORD_PROMPT_VIEW_BRIDGE_H_
 #define CHROME_BROWSER_UI_COCOA_PASSWORDS_PASSWORD_PROMPT_VIEW_BRIDGE_H_
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h"
 #import "chrome/browser/ui/cocoa/passwords/account_chooser_view_controller.h"
 #include "chrome/browser/ui/passwords/account_chooser_prompt.h"
 
+@class AccountChooserViewController;
+
 class PasswordPromptViewBridge : public AccountChooserPrompt,
                                  public ConstrainedWindowMacDelegate,
                                  public AccountChooserBridge {
  public:
   PasswordPromptViewBridge(PasswordDialogController* controller,
                            content::WebContents* web_contents);
   ~PasswordPromptViewBridge() override;
 
   // AccountChooserPrompt:
   void Show() override;
   void ControllerGone() override;
 
   // ConstrainedWindowMacDelegate:
   void OnConstrainedWindowClosed(ConstrainedWindowMac* window) override;
 
   // AccountChooserBridge:
   void PerformClose() override;
   PasswordDialogController* GetDialogController() override;
   net::URLRequestContextGetter* GetRequestContext() const override;
 
  private:
   PasswordDialogController* controller_;
   content::WebContents* web_contents_;
 
   scoped_ptr<ConstrainedWindowMac> constrained_window_;
-  base::scoped_nsobject<NSViewController> view_controller_;
+  base::scoped_nsobject<AccountChooserViewController> view_controller_;
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_PASSWORDS_PASSWORD_PROMPT_VIEW_BRIDGE_H_