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

chrome/browser/cocoa/infobar_container_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.
 
 #include "base/logging.h"
 #include "base/mac_util.h"
 #include "chrome/browser/cocoa/infobar.h"
 #import "chrome/browser/cocoa/infobar_container_controller.h"
 #import "chrome/browser/cocoa/infobar_controller.h"
 #include "chrome/browser/cocoa/tab_strip_model_observer_bridge.h"
@@ skipping 71 matching lines @@
 
     // NSMutableArray needs an initial capacity, and we rarely ever see
     // more than two infobars at a time, so that seems like a good choice.
     infobarControllers_.reset([[NSMutableArray alloc] initWithCapacity:2]);
   }
   return self;
 }
 
 - (void)dealloc {
   DCHECK([infobarControllers_ count] == 0);
+  // Remove our view from its superview so it doesn't attempt to reference
+  // it when the controller is gone.
+  [[self view] removeFromSuperview];
   [super dealloc];
 }
 
 - (void)removeDelegate:(InfoBarDelegate*)delegate {
   DCHECK(currentTabContents_);
   currentTabContents_->RemoveInfoBar(delegate);
 }
 
 // TabStripModelObserverBridge notifications
 - (void)selectTabWithContents:(TabContents*)newContents
@@ skipping 97 matching lines @@
     frame.origin.y = minY;
     minY += frame.size.height;
     // TODO(rohitrao, jrg): Replace with an animator.
     [view setFrame:frame];
   }
 
   [resizeDelegate_ resizeView:[self view] newHeight:[self desiredHeight]];
 }
 
 @end