Revert of Remove uses of SkImageDecoder from gms

gm/copyTo4444.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 "Resources.h"
@@ skipping 14 matching lines @@
     virtual SkString onShortName() {
         return SkString("copyTo4444");
     }
 
     virtual SkISize onISize() {
         return SkISize::Make(1024, 512);
     }
 
     virtual void onDraw(SkCanvas* canvas) {
         SkBitmap bm, bm4444;
-        if (!GetResourceAsBitmap("mandrill_512.png", &bm)) {
+        SkString pngFilename = GetResourcePath("mandrill_512.png");
+        if (!SkImageDecoder::DecodeFile(pngFilename.c_str(), &bm, kN32_SkColorType,
+                                        SkImageDecoder::kDecodePixels_Mode)) {
             SkDebugf("Could not decode the file. Did you forget to set the "
                      "resourcePath?\n");
             return;
         }
         canvas->drawBitmap(bm, 0, 0);
         SkAssertResult(bm.copyTo(&bm4444, kARGB_4444_SkColorType));
         canvas->drawBitmap(bm4444, SkIntToScalar(bm.width()), 0);
     }
 
 private:
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new CopyTo4444GM; }
 static GMRegistry reg(MyFactory);
 
 }