Delete SkBitmapRegionCanvas

src/android/SkBitmapRegionDecoder.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 "SkBitmapRegionCodec.h"
 #include "SkBitmapRegionDecoder.h"
 #include "SkAndroidCodec.h"
 #include "SkCodec.h"
 #include "SkCodecPriv.h"
 
 SkBitmapRegionDecoder* SkBitmapRegionDecoder::Create(
         SkData* data, Strategy strategy) {
     return SkBitmapRegionDecoder::Create(new SkMemoryStream(data),
             strategy);
 }
 
 SkBitmapRegionDecoder* SkBitmapRegionDecoder::Create(
         SkStreamRewindable* stream, Strategy strategy) {
     SkAutoTDelete<SkStreamRewindable> streamDeleter(stream);
     switch (strategy) {
-        case kCanvas_Strategy: {
-            SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(streamDeleter.release()));
-            if (nullptr == codec) {
-                SkCodecPrintf("Error: Failed to create decoder.\n");
-                return nullptr;
-            }
-
-            SkEncodedFormat format = codec->getEncodedFormat();
-            switch (format) {
-                case SkEncodedFormat::kJPEG_SkEncodedFormat:
-                case SkEncodedFormat::kPNG_SkEncodedFormat:
-                    break;
-                default:
-                    // FIXME: Support webp using a special case.  Webp does not support
-                    //        scanline decoding.
-                    return nullptr;
-            }
-
-            // If the image is a jpeg or a png, the scanline ordering should always be
-            // kTopDown or kNone.  It is relevant to check because this implementation
-            // only supports these two scanline orderings.
-            SkASSERT(SkCodec::kTopDown_SkScanlineOrder == codec->getScanlineOrder() ||
-                    SkCodec::kNone_SkScanlineOrder == codec->getScanlineOrder());
-
-            return new SkBitmapRegionCanvas(codec.release());
-        }
         case kAndroidCodec_Strategy: {
             SkAutoTDelete<SkAndroidCodec> codec =
                     SkAndroidCodec::NewFromStream(streamDeleter.release());
             if (nullptr == codec) {
                 SkCodecPrintf("Error: Failed to create codec.\n");
                 return NULL;
             }
 
             SkEncodedFormat format = codec->getEncodedFormat();
             switch (format) {
                 case SkEncodedFormat::kJPEG_SkEncodedFormat:
                 case SkEncodedFormat::kPNG_SkEncodedFormat:
                 case SkEncodedFormat::kWEBP_SkEncodedFormat:
                     break;
                 default:
                     return nullptr;
             }
 
             return new SkBitmapRegionCodec(codec.release());
         }
         default:
             SkASSERT(false);
             return nullptr;
     }
 }