keep only one typedef for the native drawing context

printing/printing_context_chromeos.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "printing/printing_context_chromeos.h"
 
 #include <cups/cups.h>
 #include <stdint.h>
 #include <unicode/ulocdata.h>
 
@@ skipping 352 matching lines @@
 
 void PrintingContextChromeos::Cancel() {
   abort_printing_ = true;
   in_print_job_ = false;
 }
 
 void PrintingContextChromeos::ReleaseContext() {
   printer_.reset();
 }
 
-gfx::NativeDrawingContext PrintingContextChromeos::context() const {
+skia::NativeDrawingContext PrintingContextChromeos::context() const {
   // Intentional No-op.
   return nullptr;
 }
 
 PrintingContext::Result PrintingContextChromeos::StreamData(
     const std::vector<char>& buffer) {
   if (abort_printing_)
     return CANCEL;
 
   DCHECK(in_print_job_);
   DCHECK(printer_);
 
   if (!printer_->StreamData(buffer))
     return OnError();
 
   return OK;
 }
 
 }  // namespace printing