Remove unnecessary allocation in nanobench

bench/nanobench.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <ctype.h>
 
 #include "nanobench.h"
@@ skipping 537 matching lines @@
         if (nullptr == codec) {
             SkDebugf("Could not create codec for %s.  Skipping bench.\n", path.c_str());
             return false;
         }
 
         // These will be initialized by SkCodec if the color type is kIndex8 and
         // unused otherwise.
         SkPMColor colors[256];
         int colorCount;
         const SkImageInfo info = codec->getInfo().makeColorType(colorType);
-        SkAutoTDeleteArray<uint8_t> row(new uint8_t[info.minRowBytes()]);
         if (codec->startScanlineDecode(info, nullptr, colors, &colorCount) != SkCodec::kSuccess)
         {
             SkDebugf("Could not create scanline decoder for %s with color type %s.  "
                     "Skipping bench.\n", path.c_str(), color_type_to_str(colorType));
             return false;
         }
         *width = info.width();
         *height = info.height();
     } else {
         SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(stream));
@@ skipping 770 matching lines @@
 
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return nanobench_main();
 }
 #endif