add ImageGenerator::NewFromData to porting layer

gm/factory.cpp

 /*
  * Copyright 2012 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"
 #include "SkCanvas.h"
 #include "SkData.h"
-#include "SkDecodingImageGenerator.h"
 #include "SkDiscardableMemoryPool.h"
 #include "SkDiscardablePixelRef.h"
 #include "SkImageDecoder.h"
 #include "SkImageGeneratorPriv.h"
 #include "SkOSFile.h"
 #include "SkStream.h"
 
 namespace skiagm {
 
 /**
  *  Draw a PNG created by SkBitmapFactory.
  */
 class FactoryGM : public GM {
 public:
     FactoryGM() {}
 
 protected:
     virtual void onOnceBeforeDraw() SK_OVERRIDE {
         // Copyright-free file from http://openclipart.org/detail/29213/paper-plane-by-ddoo
         SkString pngFilename = GetResourcePath("plane.png");
         SkAutoDataUnref data(SkData::NewFromFileName(pngFilename.c_str()));
         if (data.get()) {
             // Create a cache which will boot the pixels out anytime the
             // bitmap is unlocked.
             SkAutoTUnref<SkDiscardableMemoryPool> pool(
                 SkDiscardableMemoryPool::Create(1));
-            SkAssertResult(SkInstallDiscardablePixelRef(
-                SkDecodingImageGenerator::Create(
-                    data, SkDecodingImageGenerator::Options()),
-                &fBitmap, pool));
+            SkAssertResult(SkInstallDiscardablePixelRef(SkImageGenerator::NewFromData(data),
+                                                        &fBitmap, pool));
         }
     }
 
     virtual SkString onShortName() {
         return SkString("factory");
     }
 
     virtual SkISize onISize() {
         return SkISize::Make(640, 480);
     }
@@ skipping 12 matching lines @@
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new FactoryGM; }
 static GMRegistry reg(MyFactory);
 
 }  // namespace skiagm