Remove uses of SkImageDecoder from samplecode

samplecode/SampleRegion.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 "SampleCode.h"
 #include "SkView.h"
 #include "SkCanvas.h"
 #include "SkGradientShader.h"
 #include "SkPath.h"
 #include "SkRegion.h"
 #include "SkShader.h"
 #include "SkUtils.h"
-#include "SkImageDecoder.h"
 
 #include <math.h>
 
 static void test_strokerect(SkCanvas* canvas) {
     int width = 100;
     int height = 100;
 
     SkBitmap bitmap;
     bitmap.allocPixels(SkImageInfo::MakeA8(width*2, height*2));
     bitmap.eraseColor(SK_ColorTRANSPARENT);
@@ skipping 376 matching lines @@
 private:
     SkIRect    fBase, fRect;
 
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new RegionView; }
 static SkViewRegister reg(MyFactory);