Revert of Provides multiple implementations of Android's SkBitmapRegionDecoder

src/utils/SkBitmapRegionDecoderInterface.cpp

-/*
- * 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 "SkBitmapRegionCanvas.h"
-#include "SkBitmapRegionDecoderInterface.h"
-#include "SkBitmapRegionSampler.h"
-#include "SkScanlineDecoder.h"
-#include "SkImageDecoder.h"
-
-SkBitmapRegionDecoderInterface* SkBitmapRegionDecoderInterface::CreateBitmapRegionDecoder(
-        SkStreamRewindable* stream, Strategy strategy) {
-    switch (strategy) {
-        case kOriginal_Strategy: {
-            SkImageDecoder* decoder = SkImageDecoder::Factory(stream);
-            int width, height;
-            if (nullptr == decoder) {
-                SkDebugf("Error: Could not create image decoder.\n");
-                return nullptr;
-            }
-            if (!decoder->buildTileIndex(stream, &width, &height)) {
-                SkDebugf("Error: Could not build tile index.\n");
-                delete decoder;
-                return nullptr;
-            }
-            return new SkBitmapRegionSampler(decoder, width, height);
-        }
-        case kCanvas_Strategy: {
-            SkScanlineDecoder* decoder = SkScanlineDecoder::NewFromStream(stream);
-            if (nullptr == decoder) {
-                SkDebugf("Error: Failed to create decoder.\n");
-                return nullptr;
-            }
-            switch (decoder->getScanlineOrder()) {
-                case SkScanlineDecoder::kTopDown_SkScanlineOrder:
-                case SkScanlineDecoder::kNone_SkScanlineOrder:
-                    break;
-                default:
-                    SkDebugf("Error: Scanline ordering not supported.\n");
-                    return nullptr;
-            }
-            return new SkBitmapRegionCanvas(decoder);
-        }
-        default:
-            SkASSERT(false);
-            return nullptr;
-    }
-}