Retract SkDevice a bit more

gm/xfermodes3.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkBitmap.h"
 #include "SkGradientShader.h"
 #include "SkSurface.h"
 #include "SkXfermode.h"
 #include "SkColorPriv.h"
 
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
-#include "SkGpuDevice.h"
 #endif
 
 namespace skiagm {
 
 /**
  * This tests drawing device-covering rects with solid colors and bitmap shaders over a
  * checkerboard background using different xfermodes.
  */
 class Xfermodes3GM : public GM {
 public:
@@ skipping 194 matching lines @@
     sk_sp<SkShader> fBmpShader;
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new Xfermodes3GM;)
 
 }