keep only one typedef for the native drawing context

printing/printing_context_android.h

 // Copyright 2013 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_ANDROID_H_
 #define PRINTING_PRINTING_CONTEXT_ANDROID_H_
 
 #include <jni.h>
 
 #include <string>
@@ skipping 34 matching lines @@
   gfx::Size GetPdfPaperSizeDeviceUnits() override;
   Result UpdatePrinterSettings(bool external_preview,
                                bool show_system_dialog,
                                int page_count) override;
   Result NewDocument(const base::string16& document_name) override;
   Result NewPage() override;
   Result PageDone() override;
   Result DocumentDone() override;
   void Cancel() override;
   void ReleaseContext() override;
-  gfx::NativeDrawingContext context() const override;
+  skia::NativeDrawingContext context() const override;
 
   // Registers JNI bindings for RegisterContext.
   static bool RegisterPrintingContext(JNIEnv* env);
 
  private:
   base::android::ScopedJavaGlobalRef<jobject> j_printing_context_;
 
   // The callback from AskUserForSettings to be called when the settings are
   // ready on the Java side
   PrintSettingsCallback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintingContextAndroid);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINTING_CONTEXT_ANDROID_H_