Revert of Teach Skia to use discardable memory

Source/platform/graphics/DecodingImageGenerator.h

Index: Source/platform/graphics/DecodingImageGenerator.h
diff --git a/Source/platform/graphics/DecodingImageGenerator.h b/Source/platform/graphics/DecodingImageGenerator.h
deleted file mode 100644
index f23fd4a6fda3f73ef129af20b425fa37e94a601e..0000000000000000000000000000000000000000
--- a/Source/platform/graphics/DecodingImageGenerator.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Copyright (C) 2013 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- * 2.  Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef DecodingImageGenerator_h
-#define DecodingImageGenerator_h
-
-#include "SkImageGenerator.h"
-#include "SkImageInfo.h"
-
-#include "wtf/RefPtr.h"
-
-class SkData;
-
-namespace WebCore {
-
-class ImageFrameGenerator;
-
-// Implements SkImageGenerator and used by SkPixelRef to populate a discardable
-// memory with decoded pixels.
-//
-// This class does not own an ImageDecode. It does not own encoded data. It serves
-// as and adapter to ImageFrameGenerator which actually performs decoding.
-class DecodingImageGenerator : public SkImageGenerator {
-public:
-    DecodingImageGenerator(PassRefPtr<ImageFrameGenerator>, const SkImageInfo&, size_t index);
-    virtual ~DecodingImageGenerator();
-
-    // SkImageGenerator implementation.
-    virtual SkData* refEncodedData();
-    virtual bool getInfo(SkImageInfo*);
-    virtual bool getPixels(const SkImageInfo&, void* pixels, size_t rowBytes);
-
-private:
-    RefPtr<ImageFrameGenerator> m_frameGenerator;
-    SkImageInfo m_imageInfo;
-    size_t m_frameIndex;
-};
-
-} // namespace WebCore
-
-#endif // DecodingImageGenerator_h_