[cc] Remove all WTF #includes from CCLayerTreeHost

cc/RateLimiter.h

Index: cc/RateLimiter.h
diff --git a/cc/RateLimiter.h b/cc/RateLimiter.h
index 13c791589ddacc0838d516af0053cc08d41fc644..7b48d742b7df083bd39ccea05986a54502097a2d 100644
--- a/cc/RateLimiter.h
+++ b/cc/RateLimiter.h
@@ -7,8 +7,7 @@
 
 #if USE(ACCELERATED_COMPOSITING)
 
-#include <wtf/PassRefPtr.h>
-#include <wtf/RefCounted.h>
+#include "base/memory/ref_counted.h"
 
 namespace WebKit {
 class WebGraphicsContext3D;
@@ -25,10 +24,9 @@ public:
 // 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();
 
@@ -37,6 +35,8 @@ public:
 
 private:
     RateLimiter(WebKit::WebGraphicsContext3D*, RateLimiterClient*);
+    ~RateLimiter();
+    friend class base::RefCounted<RateLimiter>;
 
     class Task;
     friend class Task;