Remove unused WEBKIT_DEPRECATED thread

content/browser/in_process_webkit/webkit_thread.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 CONTENT_BROWSER_IN_PROCESS_WEBKIT_WEBKIT_THREAD_H_
-#define CONTENT_BROWSER_IN_PROCESS_WEBKIT_WEBKIT_THREAD_H_
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/threading/thread.h"
-#include "content/browser/browser_thread_impl.h"
-#include "content/common/content_export.h"
-
-namespace content {
-class BrowserWebKitPlatformSupportImpl;
-
-// This creates a WebKit main thread on instantiation (if not in
-// --single-process mode) on construction and kills it on deletion.
-class CONTENT_EXPORT WebKitThread {
- public:
-  // Called from the UI thread.
-  WebKitThread();
-  ~WebKitThread();
-  void Initialize();
-
- private:
-  // Must be private so that we can carefully control its lifetime.
-  class InternalWebKitThread : public BrowserThreadImpl {
-   public:
-    InternalWebKitThread();
-    virtual ~InternalWebKitThread();
-    // Does the actual initialization and shutdown of WebKit.  Called at the
-    // beginning and end of the thread's lifetime.
-    virtual void Init() OVERRIDE;
-    virtual void CleanUp() OVERRIDE;
-
-   private:
-    // The WebKitPlatformSupport implementation.  Only access on WebKit thread.
-    scoped_ptr<BrowserWebKitPlatformSupportImpl> webkit_platform_support_;
-  };
-
-  // Pointer to the actual WebKitThread.
-  scoped_ptr<InternalWebKitThread> webkit_thread_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebKitThread);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_IN_PROCESS_WEBKIT_WEBKIT_THREAD_H_