remove DownSample imagefilter

gm/imagefilterscropped.cpp

 /*
  * Copyright 2011 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 "SkCanvas.h"
 #include "SkColorFilter.h"
 #include "SkColorPriv.h"
 #include "SkShader.h"
 
 #include "SkBlurImageFilter.h"
 #include "SkMorphologyImageFilter.h"
 #include "SkColorFilterImageFilter.h"
 #include "SkMergeImageFilter.h"
 #include "SkOffsetImageFilter.h"
-#include "SkTestImageFilters.h"
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static void draw_paint(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
     SkPaint paint;
     paint.setImageFilter(std::move(imf));
     paint.setColor(SK_ColorBLACK);
     canvas->save();
     canvas->clipRect(r);
     canvas->drawPaint(paint);
@@ skipping 141 matching lines @@
     }
 
 private:
     SkBitmap fCheckerboard;
     typedef GM INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new ImageFiltersCroppedGM; )