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

chrome/browser/cocoa/find_bar_cocoa_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 "app/l10n_util.h"
 #include "base/mac_util.h"
 #include "base/sys_string_conversions.h"
 #include "grit/generated_resources.h"
@@ skipping 32 matching lines @@
                name:kFindPasteboardChangedNotification
              object:[FindPasteboard sharedInstance]];
   }
   return self;
 }
 
 - (void)dealloc {
   // All animations should be explicitly stopped by the TabContents before a tab
   // is closed.
   DCHECK(!currentAnimation_.get());
+  // Remove our view from its superview so it doesn't attempt to reference
+  // it when the controller is gone.
+  [[self view] removeFromSuperview];
   [[NSNotificationCenter defaultCenter] removeObserver:self];
   [super dealloc];
 }
 
 - (void)setFindBarBridge:(FindBarBridge*)findBarBridge {
   DCHECK(!findBarBridge_);  // should only be called once.
   findBarBridge_ = findBarBridge;
 }
 
 - (void)awakeFromNib {
@@ skipping 276 matching lines @@
 
   currentAnimation_.reset(
       [[NSViewAnimation alloc]
         initWithViewAnimations:[NSArray arrayWithObjects:dict, nil]]);
   [currentAnimation_ setDuration:duration];
   [currentAnimation_ setDelegate:self];
   [currentAnimation_ startAnimation];
 }
 
 @end