blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/frame/FrameClient.h

 // Copyright 2014 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 FrameClient_h
 #define FrameClient_h
 
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/BlameContext.h"
 
 namespace blink {
 
 class Frame;
-class LocalFrame;
-class MessageEvent;
-class SecurityOrigin;
 enum class FrameDetachType;
 
 class CORE_EXPORT FrameClient : public GarbageCollectedFinalized<FrameClient> {
  public:
   virtual bool inShadowTree() const = 0;
 
   // TODO(dcheng): Move this into FrameLoaderClient, since remote frames don't
   // need this.
   virtual void willBeDetached() = 0;
   virtual void detached(FrameDetachType) = 0;
@@ skipping 15 matching lines @@
   virtual BlameContext* frameBlameContext() { return nullptr; }
 
   virtual ~FrameClient() {}
 
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 };
 
 }  // namespace blink
 
 #endif  // FrameClient_h