Delete dead BitmapRegionDecoder code in tools

tools/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 "SkBitmapRegionSampler.h"
 #include "SkAndroidCodec.h"
 #include "SkCodec.h"
 #include "SkCodecPriv.h"
 #include "SkImageDecoder.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 kOriginal_Strategy: {
-            SkImageDecoder* decoder = SkImageDecoder::Factory(streamDeleter);
-            int width, height;
-            if (nullptr == decoder) {
-                SkCodecPrintf("Error: Could not create image decoder.\n");
-                return nullptr;
-            }
-            if (!decoder->buildTileIndex(streamDeleter.detach(), &width, &height)) {
-                SkCodecPrintf("Error: Could not build tile index.\n");
-                delete decoder;
-                return nullptr;
-            }
-            return new SkBitmapRegionSampler(decoder, width, height);
-        }
         case kCanvas_Strategy: {
             SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(streamDeleter.detach()));
             if (nullptr == codec) {
                 SkCodecPrintf("Error: Failed to create decoder.\n");
                 return nullptr;
             }
 
             if (SkEncodedFormat::kWEBP_SkEncodedFormat == codec->getEncodedFormat()) {
                 // FIXME: Support webp using a special case.  Webp does not support
                 //        scanline decoding.
@@ skipping 17 matching lines @@
                 SkCodecPrintf("Error: Failed to create codec.\n");
                 return NULL;
             }
             return new SkBitmapRegionCodec(codec.detach());
         }
         default:
             SkASSERT(false);
             return nullptr;
     }
 }