Revert of Create an SkCodecImageGenerator

src/core/SkCodecImageGenerator.h

-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkCodec.h"
-#include "SkData.h"
-#include "SkImageGenerator.h"
-
-class SkCodecImageGenerator : public SkImageGenerator {
-public:
-    /*
-     * If this data represents an encoded image that we know how to decode,
-     * return an SkCodecImageGenerator.  Otherwise return nullptr.
-     *
-     * Refs the data if an image generator can be returned.  Otherwise does
-     * not affect the data.
-     */
-    static SkImageGenerator* NewFromEncodedCodec(SkData* data);
-
-protected:
-    SkData* onRefEncodedData(SK_REFENCODEDDATA_CTXPARAM) override;
-
-    bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, SkPMColor ctable[],
-            int* ctableCount) override;
-
-    bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
-            SkYUVColorSpace* colorSpace) override;
-
-private:
-    /*
-     * Takes ownership of codec
-     * Refs the data
-     */
-    SkCodecImageGenerator(SkCodec* codec, SkData* data);
-
-    SkAutoTDelete<SkCodec> fCodec;
-    SkAutoTUnref<SkData> fData;
-
-    typedef SkImageGenerator INHERITED;
-};