Moving GraphicsContext and dependencies from core to platform.

Source/core/html/canvas/WebGLShaderPrecisionFormat.h

 /*
  * Copyright (c) 2012, 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:
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
@@ skipping 10 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebGLShaderPrecisionFormat_h
 #define WebGLShaderPrecisionFormat_h
 
 #include "bindings/v8/ScriptWrappable.h"
-#include "core/platform/graphics/GraphicsContext3D.h"
+#include "platform/graphics/GraphicsContext3D.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
 class WebGLShaderPrecisionFormat : public RefCounted<WebGLShaderPrecisionFormat>, public ScriptWrappable {
 public:
     static PassRefPtr<WebGLShaderPrecisionFormat> create(GC3Dint rangeMin, GC3Dint rangeMax, GC3Dint precision);
 
     GC3Dint rangeMin() const;
     GC3Dint rangeMax() const;
     GC3Dint precision() const;
 
 private:
     WebGLShaderPrecisionFormat(GC3Dint rangeMin, GC3Dint rangeMax, GC3Dint precision);
 
     GC3Dint m_rangeMin;
     GC3Dint m_rangeMax;
     GC3Dint m_precision;
 };
 
 }
 
 #endif // WebGLShaderPrecisionFormat_h