keep only one typedef for the native drawing context

printing/printing_context.h

 // Copyright (c) 2011 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.
 
 #ifndef PRINTING_PRINTING_CONTEXT_H_
 #define PRINTING_PRINTING_CONTEXT_H_
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "printing/print_settings.h"
+#include "skia/ext/native_drawing_context.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace printing {
 
 // An abstraction of a printer context, implemented by objects that describe the
 // user selected printing context. This includes the OS-dependent UI to ask the
@@ skipping 79 matching lines @@
   virtual Result DocumentDone() = 0;
 
   // Cancels printing. Can be used in a multi-threaded context. Takes effect
   // immediately.
   virtual void Cancel() = 0;
 
   // Releases the native printing context.
   virtual void ReleaseContext() = 0;
 
   // Returns the native context used to print.
-  virtual gfx::NativeDrawingContext context() const = 0;
+  virtual skia::NativeDrawingContext context() const = 0;
 
   // Creates an instance of this object. Implementers of this interface should
   // implement this method to create an object of their implementation.
   static std::unique_ptr<PrintingContext> Create(Delegate* delegate);
 
   void set_margin_type(MarginType type);
   void set_is_modifiable(bool is_modifiable);
 
   const PrintSettings& settings() const {
     return settings_;
@@ skipping 20 matching lines @@
   // Did the user cancel the print job.
   volatile bool abort_printing_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PrintingContext);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINTING_CONTEXT_H_