include RefCounted.h where needed, only.

third_party/WebKit/Source/platform/text/CompressibleString.h

 // Copyright 2016 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 CompressibleString_h
 #define CompressibleString_h
 
 #include "platform/PlatformExport.h"
+#include "wtf/RefCounted.h"
 #include "wtf/text/Unicode.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 // TODO(hajimehoshi): Now these classes are in platform/text to use UMA. Move
 // them to wtf/text.
 
 class PLATFORM_EXPORT CompressibleStringImpl final : public RefCounted<CompressibleStringImpl> {
     WTF_MAKE_NONCOPYABLE(CompressibleStringImpl);
@@ skipping 91 matching lines @@
 
     mutable RefPtr<CompressibleStringImpl> m_impl;
 };
 
 } // namespace blink
 
 using blink::CompressibleString;
 using blink::CompressibleStringImpl;
 
 #endif