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

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

 // 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.
 
 #include "chrome/browser/ui/cocoa/passwords/password_prompt_view_bridge.h"
 
 #include "chrome/browser/profiles/profile.h"
 #import "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.h"
 #import "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_window.h"
 #import "chrome/browser/ui/cocoa/passwords/account_chooser_view_controller.h"
 #include "chrome/browser/ui/passwords/password_dialog_controller.h"
 #include "content/public/browser/web_contents.h"
 
 PasswordPromptViewBridge::PasswordPromptViewBridge(
     PasswordDialogController* controller,
     content::WebContents* web_contents)
     : controller_(controller),
       web_contents_(web_contents) {
 }
 
-PasswordPromptViewBridge::~PasswordPromptViewBridge() = default;
+PasswordPromptViewBridge::~PasswordPromptViewBridge() {
+  [view_controller_ setBridge:nil];
+}
 
 void PasswordPromptViewBridge::Show() {
   view_controller_.reset(
       [[AccountChooserViewController alloc] initWithBridge:this]);
   // Setup the constrained window that will show the view.
   base::scoped_nsobject<NSWindow> window([[ConstrainedWindowCustomWindow alloc]
       initWithContentRect:[[view_controller_ view] bounds]]);
   [window setContentView:[view_controller_ view]];
   base::scoped_nsobject<CustomConstrainedWindowSheet> sheet(
       [[CustomConstrainedWindowSheet alloc] initWithCustomWindow:window]);
@@ skipping 25 matching lines @@
 net::URLRequestContextGetter*
 PasswordPromptViewBridge::GetRequestContext() const {
   return Profile::FromBrowserContext(web_contents_->GetBrowserContext())->
       GetRequestContext();
 }
 
 AccountChooserPrompt* CreateAccountChooserPromptView(
     PasswordDialogController* controller, content::WebContents* web_contents) {
   return new PasswordPromptViewBridge(controller, web_contents);
 }