Makes it so when NSViewControllers go away that they remove their views from ...

chrome/browser/cocoa/infobar_controller.mm

 // Copyright (c) 2009 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/logging.h"  // for NOTREACHED()
 #include "base/mac_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/cocoa/event_utils.h"
@@ skipping 25 matching lines @@
 
 - (id)initWithDelegate:(InfoBarDelegate*)delegate {
   DCHECK(delegate);
   if ((self = [super initWithNibName:@"InfoBar"
                               bundle:mac_util::MainAppBundle()])) {
     delegate_ = delegate;
   }
   return self;
 }
 
+- (void)dealloc {
+  // Remove our view from its superview so it doesn't attempt to reference
+  // it when the controller is gone.
+  [[self view] removeFromSuperview];
+  [super dealloc];
+}
+
 // All infobars have an icon, so we set up the icon in the base class
 // awakeFromNib.
 - (void)awakeFromNib {
   if (delegate_->GetIcon()) {
     [image_ setImage:gfx::SkBitmapToNSImage(*(delegate_->GetIcon()))];
   } else {
     // No icon, remove it from the view and grow the textfield to include the
     // space.
     NSRect imageFrame = [image_ frame];
     NSRect labelFrame = [label_ frame];
@@ skipping 261 matching lines @@
   LinkInfoBarController* controller =
       [[LinkInfoBarController alloc] initWithDelegate:this];
   return new InfoBar(controller);
 }
 
 InfoBar* ConfirmInfoBarDelegate::CreateInfoBar() {
   ConfirmInfoBarController* controller =
       [[ConfirmInfoBarController alloc] initWithDelegate:this];
   return new InfoBar(controller);
 }