Moving GraphicsContext and dependencies from core to platform.

Source/core/html/canvas/WebGLCompressedTexturePVRTC.cpp

 /*
  * 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
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 10 matching lines @@
  * 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.
  */
 
 #include "config.h"
 
 #include "core/html/canvas/WebGLCompressedTexturePVRTC.h"
 
 #include "core/html/canvas/WebGLRenderingContext.h"
-#include "core/platform/graphics/Extensions3D.h"
+#include "platform/graphics/Extensions3D.h"
 
 namespace WebCore {
 
 WebGLCompressedTexturePVRTC::WebGLCompressedTexturePVRTC(WebGLRenderingContext* context)
     : WebGLExtension(context)
 {
     ScriptWrappable::init(this);
     context->addCompressedTextureFormat(Extensions3D::COMPRESSED_RGB_PVRTC_4BPPV1_IMG);
     context->addCompressedTextureFormat(Extensions3D::COMPRESSED_RGB_PVRTC_2BPPV1_IMG);
     context->addCompressedTextureFormat(Extensions3D::COMPRESSED_RGBA_PVRTC_4BPPV1_IMG);
@@ skipping 19 matching lines @@
     Extensions3D* extensions = context->graphicsContext3D()->extensions();
     return extensions->supports("GL_IMG_texture_compression_pvrtc");
 }
 
 const char* WebGLCompressedTexturePVRTC::extensionName()
 {
     return "WEBGL_compressed_texture_pvrtc";
 }
 
 } // namespace WebCore