blink: Cleanup class forward declarations

third_party/WebKit/Source/platform/graphics/paint/PaintArtifact.h

 // Copyright 2015 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 PaintArtifact_h
 #define PaintArtifact_h
 
 #include "platform/PlatformExport.h"
 #include "platform/graphics/paint/DisplayItemList.h"
 #include "platform/graphics/paint/PaintChunk.h"
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class GraphicsContext;
-class GraphicsLayer;
 class WebDisplayItemList;
 
 // The output of painting, consisting of a series of drawings in paint order,
 // partitioned into discontiguous chunks with a common set of paint properties
 // (i.e. associated with the same transform, clip, effects, etc.).
 //
 // It represents a particular state of the world, and should be immutable
 // (const) to most of its users.
 //
 // Unless its dangerous accessors are used, it promises to be in a reasonable
@@ skipping 49 matching lines @@
 
  private:
   DisplayItemList m_displayItemList;
   Vector<PaintChunk> m_paintChunks;
   bool m_isSuitableForGpuRasterization;
 };
 
 }  // namespace blink
 
 #endif  // PaintArtifact_h