Mac Chromium style checker cleanup

chrome/browser/ui/cocoa/infobars/extension_infobar_controller.mm

 // Copyright (c) 2012 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 "chrome/browser/ui/cocoa/infobars/extension_infobar_controller.h"
 
 #include <cmath>
 
 #include "chrome/browser/api/infobars/infobar_service.h"
 #include "chrome/browser/extensions/extension_host.h"
@@ skipping 100 matching lines @@
                          0, 0, image_size, image_size,
                          false);
     canvas->DrawImageInt(*drop_image,
                          image_size + kDropArrowLeftMarginPx,
                          image_size / 2);
     [owner_ setButtonImage:gfx::SkBitmapToNSImage(
         canvas->ExtractImageRep().sk_bitmap())];
   }
 
   // Overridden from ExtensionInfoBarDelegate::DelegateObserver:
-  virtual void OnDelegateDeleted() {
+  virtual void OnDelegateDeleted() OVERRIDE {
     delegate_ = NULL;
   }
 
  private:
   // Weak. Owns us.
   ExtensionInfoBarController* owner_;
 
   // Weak.
   ExtensionInfoBarDelegate* delegate_;
 
@@ skipping 140 matching lines @@
 
 InfoBar* ExtensionInfoBarDelegate::CreateInfoBar(InfoBarService* owner) {
   NSWindow* window =
       [(NSView*)owner->GetWebContents()->GetContentNativeView() window];
   ExtensionInfoBarController* controller =
       [[ExtensionInfoBarController alloc] initWithDelegate:this
                                                      owner:owner
                                                     window:window];
   return new InfoBar(controller, this);
 }