WebView: Cleanup class/struct forward declarations

android_webview/native/aw_web_contents_view_delegate.h

 // 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.
 
 #ifndef ANDROID_WEBVIEW_NATIVE_AW_WEB_CONTENTS_VIEW_DELEGATE_H_
 #define ANDROID_WEBVIEW_NATIVE_AW_WEB_CONTENTS_VIEW_DELEGATE_H_
 
 #include "content/public/browser/web_contents_view_delegate.h"
 
 #include "base/macros.h"
 
 namespace content {
 class WebContents;
 }  // namespace content
 
 namespace android_webview {
 
-class AwContents;
-
 class AwWebContentsViewDelegate : public content::WebContentsViewDelegate {
  public:
   static content::WebContentsViewDelegate* Create(
       content::WebContents* web_contents);
 
   ~AwWebContentsViewDelegate() override;
 
   // content::WebContentsViewDelegate implementation.
   content::WebDragDestDelegate* GetDragDestDelegate() override;
   void ShowContextMenu(content::RenderFrameHost* render_frame_host,
                        const content::ContextMenuParams& params) override;
 
  private:
   AwWebContentsViewDelegate(content::WebContents* web_contents);
 
   // Weak pointer due to ownership graph:
   // WebContents->WebContentsView->this.
   content::WebContents* web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(AwWebContentsViewDelegate);
 };
 
 }  // namespace android_webview
 
 
 #endif  // ANDROID_WEBVIEW_NATIVE_AW_WEB_CONTENTS_VIEW_DELEGATE_H_