keep only one typedef for the native drawing context

printing/pdf_metafile_skia.cc

Index: printing/pdf_metafile_skia.cc
diff --git a/printing/pdf_metafile_skia.cc b/printing/pdf_metafile_skia.cc
index df96d376271be97bceca1b71f52c984c069ec228..8725e2b81ad7bbdbfe07925de4925f3458d80e19 100644
--- a/printing/pdf_metafile_skia.cc
+++ b/printing/pdf_metafile_skia.cc
@@ -228,20 +228,20 @@ unsigned int PdfMetafileSkia::GetPageCount() const {
   return base::checked_cast<unsigned int>(data_->pages_.size());
 }
 
-gfx::NativeDrawingContext PdfMetafileSkia::context() const {
+skia::NativeDrawingContext PdfMetafileSkia::context() const {
   NOTREACHED();
   return nullptr;
 }
 
 
 #if defined(OS_WIN)
-bool PdfMetafileSkia::Playback(gfx::NativeDrawingContext hdc,
+bool PdfMetafileSkia::Playback(skia::NativeDrawingContext hdc,
                                const RECT* rect) const {
   NOTREACHED();
   return false;
 }
 
-bool PdfMetafileSkia::SafePlayback(gfx::NativeDrawingContext hdc) const {
+bool PdfMetafileSkia::SafePlayback(skia::NativeDrawingContext hdc) const {
   NOTREACHED();
   return false;
 }