Revert of Provides multiple implementations of Android's SkBitmapRegionDecoder

src/utils/SkBitmapRegionDecoderInterface.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.
- */
-
-#ifndef SkBitmapRegionDecoder_DEFINED
-#define SkBitmapRegionDecoder_DEFINED
-
-#include "SkBitmap.h"
-#include "SkStream.h"
-
-/*
- * This class aims to provide an interface to test multiple implementations of
- * SkBitmapRegionDecoder.
- */
-class SkBitmapRegionDecoderInterface {
-public:
-
-    enum Strategy {
-        kCanvas_Strategy,   // Draw to the canvas, uses SkCodec
-        kOriginal_Strategy, // Sampling, uses SkImageDecoder
-        // TODO (msarett): Add strategy for SkScaledCodec
-    };
-
-    /*
-     * @param stream   Encoded image stream, takes ownership
-     * @param strategy Strategy used for scaling and subsetting
-     * @return         Tries to create an SkBitmapRegionDecoder, returns NULL
-     *                 on failure
-     */
-    static SkBitmapRegionDecoderInterface* CreateBitmapRegionDecoder(
-            SkStreamRewindable* stream, Strategy strategy);
-
-    /*
-     * Decode a scaled region of the encoded image stream
-     *
-     * @param start_x    X-coordinate of upper-left corner of region.
-     *                   This coordinate is unscaled, relative to the original dimensions.
-     * @param start_y    Y-coordinate of upper-left corner of region.
-     *                   This coordinate is unscaled, relative to the original dimensions.
-     * @param width      Width of the region to decode.
-     *                   This distance is unscaled, relative to the original dimensions.
-     * @param height     Height of the region to decode.
-     *                   This distance is unscaled, relative to the original dimensions.
-     * @param sampleSize An integer downscaling factor for the decode.
-     * @param colorType  Preferred output colorType.
-     *                   New implementations should return NULL if they do not support
-     *                   decoding to this color type.
-     *                   The old kOriginal_Strategy will decode to a default color type
-     *                   if this color type is unsupported.
-     * @return           Pointer to a bitmap of the decoded region on success, NULL on
-     *                   failure.
-     */
-    virtual SkBitmap* decodeRegion(int start_x, int start_y, int width,
-                                   int height, int sampleSize,
-                                   SkColorType colorType) = 0;
-
-    int width() const { return fWidth; }
-    int height() const { return fHeight; }
-
-    virtual ~SkBitmapRegionDecoderInterface() {}
-
-protected:
-
-    SkBitmapRegionDecoderInterface(int width, int height)
-        : fWidth(width)
-        , fHeight(height)
-    {}
-
-private:
-    const int fWidth;
-    const int fHeight;
-};
-
-#endif