Add nanobench tests for BitmapRegionDecoder

dm/DMSrcSink.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 "DMSrcSink.h"
 #include "SamplePipeControllers.h"
 #include "SkCodec.h"
+#include "SkCodecTools.h"
 #include "SkCommonFlags.h"
 #include "SkData.h"
 #include "SkDocument.h"
 #include "SkError.h"
 #include "SkFunction.h"
 #include "SkImageGenerator.h"
 #include "SkMultiPictureDraw.h"
 #include "SkNullCanvas.h"
 #include "SkOSFile.h"
 #include "SkPictureData.h"
@@ skipping 188 matching lines @@
 static SkString get_scaled_name(const Path& path, float scale) {
     return SkStringPrintf("%s_%.3f", SkOSPath::Basename(path.c_str()).c_str(), scale);
 }
 
 Name BRDSrc::name() const {
     // We will replicate the names used by CodecSrc so that images can
     // be compared in Gold.
     if (1 == fSampleSize) {
         return SkOSPath::Basename(fPath.c_str());
     }
-    return get_scaled_name(fPath, BRDSrc::GetScale(fSampleSize));
+    return get_scaled_name(fPath, get_scale_from_sample_size(fSampleSize));
 }
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
 CodecSrc::CodecSrc(Path path, Mode mode, DstColorType dstColorType, float scale)
     : fPath(path)
     , fMode(mode)
     , fDstColorType(dstColorType)
     , fScale(scale)
 {}
@@ skipping 1032 matching lines @@
             skr.visit<void>(i, drawsAsSingletonPictures);
         }
         SkAutoTUnref<SkPicture> macroPic(macroRec.endRecordingAsPicture());
 
         canvas->drawPicture(macroPic);
         return "";
     });
 }
 
 }  // namespace DM