Remove uses of SkImageDecoder from samplecode

samplecode/SampleLines.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 "DecodeFile.h"
 #include "SampleCode.h"
 #include "SkView.h"
 #include "SkCanvas.h"
 #include "SkCornerPathEffect.h"
 #include "SkGradientShader.h"
 #include "SkGraphics.h"
-#include "SkImageDecoder.h"
 #include "SkPath.h"
 #include "SkRandom.h"
 #include "SkRegion.h"
 #include "SkShader.h"
 #include "SkUtils.h"
 #include "SkColorPriv.h"
 #include "SkColorFilter.h"
 #include "SkTime.h"
 #include "SkTypeface.h"
 #include "SkXfermode.h"
 
 #include "SkStream.h"
 #include "SkColorPriv.h"
-#include "SkImageDecoder.h"
 
 class LinesView : public SampleView {
 public:
     LinesView() {}
 
 protected:
     // overrides from SkEventSink
     bool onQuery(SkEvent* evt) override {
         if (SampleCode::TitleQ(*evt)) {
             SampleCode::TitleR(evt, "Lines");
@@ skipping 17 matching lines @@
      //   paint.setAntiAlias(true);
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setStrokeWidth(SkScalarHalf(SkIntToScalar(3)));
         paint.setColor(0xFFFF8800);
      //   paint.setColor(0xFFFFFFFF);
         canvas->drawRect(r, paint);
     }
 
     void onDrawContent(SkCanvas* canvas) override {
         SkBitmap bm;
-        SkImageDecoder::DecodeFile("/kill.gif", &bm);
+        decode_file("/kill.gif", &bm);
         canvas->drawBitmap(bm, 0, 0, nullptr);
 
         this->drawRings(canvas);
         return;
 
         SkPaint paint;
 
       //  fAlpha = 0x80;
         paint.setColor(SK_ColorWHITE);
         paint.setAlpha(fAlpha & 0xFF);
@@ skipping 26 matching lines @@
 private:
 
     int fAlpha;
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new LinesView; }
 static SkViewRegister reg(MyFactory);