blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/paint/PaintLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
@@ skipping 50 matching lines @@
 #include "wtf/AutoReset.h"
 #include "wtf/PtrUtil.h"
 #include <memory>
 
 namespace blink {
 
 class CompositedLayerMapping;
 class CompositorFilterOperations;
 class ComputedStyle;
 class FilterOperations;
-class HitTestRequest;
 class HitTestResult;
 class HitTestingTransformState;
 class PaintLayerCompositor;
 class PaintTiming;
 class TransformationMatrix;
 
 enum IncludeSelfOrNot { IncludeSelf, ExcludeSelf };
 
 enum CompositingQueryMode {
   CompositingQueriesAreAllowed,
@@ skipping 1155 matching lines @@
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLayerTree(const blink::PaintLayer*);
 CORE_EXPORT void showLayerTree(const blink::LayoutObject*);
 #endif
 
 #endif  // Layer_h