Clean up forward declarations in Source/platform

Source/platform/graphics/Path.h

 /*
  * Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved.
  *               2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2007-2008 Torch Mobile, Inc.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 27 matching lines @@
 #include "wtf/Forward.h"
 
 class SkPath;
 
 namespace blink {
 
 class AffineTransform;
 class FloatPoint;
 class FloatRect;
 class FloatSize;
-class GraphicsContext;
 class StrokeData;
 
 enum PathElementType {
     PathElementMoveToPoint, // The points member will contain 1 value.
     PathElementAddLineToPoint, // The points member will contain 1 value.
     PathElementAddQuadCurveToPoint, // The points member will contain 2 values.
     PathElementAddCurveToPoint, // The points member will contain 3 values.
     PathElementCloseSubpath // The points member will contain no values.
 };
 
@@ skipping 96 matching lines @@
     SkPath m_path;
 };
 
 #if ENABLE(ASSERT)
 PLATFORM_EXPORT bool ellipseIsRenderable(float startAngle, float endAngle);
 #endif
 
 } // namespace blink
 
 #endif