[cc] Remove all WTF #includes from CCLayerTreeHost

cc/RateLimiter.h

 // Copyright 2011 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 RateLimiter_h
 #define RateLimiter_h
 
 #if USE(ACCELERATED_COMPOSITING)
 
-#include <wtf/PassRefPtr.h>
-#include <wtf/RefCounted.h>
+#include "base/memory/ref_counted.h"
 
 namespace WebKit {
 class WebGraphicsContext3D;
 }
 
 namespace cc {
 
 class RateLimiterClient {
 public:
     virtual void rateLimit() = 0;
 };
 
 // A RateLimiter can be used to make sure that a single context does not dominate all execution time.
 // To use, construct a RateLimiter class around the context and call start() whenever calls are made on the
 // context outside of normal flow control. RateLimiter will block if the context is too far ahead of the
 // compositor.
-class RateLimiter : public RefCounted<RateLimiter> {
+class RateLimiter : public base::RefCounted<RateLimiter> {
 public:
-    static PassRefPtr<RateLimiter> create(WebKit::WebGraphicsContext3D*, RateLimiterClient*);
-    ~RateLimiter();
+    static scoped_refptr<RateLimiter> create(WebKit::WebGraphicsContext3D*, RateLimiterClient*);
 
     void start();
 
     // Context and client will not be accessed after stop().
     void stop();
 
 private:
     RateLimiter(WebKit::WebGraphicsContext3D*, RateLimiterClient*);
+    ~RateLimiter();
+    friend class base::RefCounted<RateLimiter>;
 
     class Task;
     friend class Task;
     void rateLimitContext();
 
     WebKit::WebGraphicsContext3D* m_context;
     bool m_active;
     RateLimiterClient *m_client;
 };
 
 }
 #endif // USE(ACCELERATED_COMPOSITING)
 
 #endif