Add more functionality to WebView.

chrome/browser/tab_contents/chrome_web_contents_view_delegate_mac.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/tab_contents/chrome_web_contents_view_delegate_mac.h"
 
 #import "chrome/browser/renderer_host/chrome_render_widget_host_view_mac_delegate.h"
 #include "chrome/browser/tab_contents/render_view_context_menu_mac.h"
 #include "chrome/browser/tab_contents/web_drag_bookmark_handler_mac.h"
-#import "chrome/browser/ui/cocoa/view_id_util.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 
 namespace chrome_web_contents_view_delegate_mac {
 content::WebContentsViewDelegate* CreateWebContentsViewDelegateMac(
     content::WebContents* web_contents) {
   return new ChromeWebContentsViewDelegateMac(web_contents);
 }
 }
 
@@ skipping 31 matching lines @@
       web_contents_->GetRenderWidgetHostView();
   if (widget_view && widget_view->IsShowingContextMenu())
     return;
 
   context_menu_.reset(
       new RenderViewContextMenuMac(web_contents_,
                                    params,
                                    web_contents_->GetContentNativeView()));
   context_menu_->Init();
 }
-
-void ChromeWebContentsViewDelegateMac::NativeViewCreated(NSView* view) {
-  view_id_util::SetID(view, VIEW_ID_TAB_CONTAINER);
-}
-
-void ChromeWebContentsViewDelegateMac::NativeViewDestroyed(NSView* view) {
-  view_id_util::UnsetID(view);
-}