keep only one typedef for the native drawing context

printing/pdf_metafile_skia.h

Index: printing/pdf_metafile_skia.h
diff --git a/printing/pdf_metafile_skia.h b/printing/pdf_metafile_skia.h
index 28bd41f4cb4a01af7aaf73cfe28e54ecc5d59f3b..d79dcca5177a30c5baaf0448c70e810a4a13dabb 100644
--- a/printing/pdf_metafile_skia.h
+++ b/printing/pdf_metafile_skia.h
@@ -52,15 +52,15 @@ class PRINTING_EXPORT PdfMetafileSkia : public Metafile {
   gfx::Rect GetPageBounds(unsigned int page_number) const override;
   unsigned int GetPageCount() const override;
 
-  gfx::NativeDrawingContext context() const override;
+  skia::NativeDrawingContext context() const override;
 
 #if defined(OS_WIN)
-  bool Playback(gfx::NativeDrawingContext hdc,
+  bool Playback(skia::NativeDrawingContext hdc,
                 const RECT* rect) const override;
-  bool SafePlayback(gfx::NativeDrawingContext hdc) const override;
+  bool SafePlayback(skia::NativeDrawingContext hdc) const override;
 #elif defined(OS_MACOSX)
   bool RenderPage(unsigned int page_number,
-                  gfx::NativeDrawingContext context,
+                  skia::NativeDrawingContext context,
                   const CGRect rect,
                   const MacRenderPageParams& params) const override;
 #endif