Add nanobench tests for BitmapRegionDecoder

bench/CodecBench.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 "CodecBench.h"
+#include "CodecBenchPriv.h"
 #include "SkBitmap.h"
 #include "SkCodec.h"
 #include "SkOSFile.h"
 
 CodecBench::CodecBench(SkString baseName, SkData* encoded, SkColorType colorType)
     : fColorType(colorType)
     , fData(SkRef(encoded))
 {
     // Parse filename and the color type to give the benchmark a useful name
-    const char* colorName;
-    switch(colorType) {
-        case kN32_SkColorType:
-            colorName = "N32";
-            break;
-        case kRGB_565_SkColorType:
-            colorName = "565";
-            break;
-        case kAlpha_8_SkColorType:
-            colorName = "Alpha8";
-            break;
-        default:
-            colorName = "Unknown";
-    }
-    fName.printf("Codec_%s_%s", baseName.c_str(), colorName);
+    fName.printf("Codec_%s_%s", baseName.c_str(), color_type_to_str(colorType));
 #ifdef SK_DEBUG
     // Ensure that we can create an SkCodec from this data.
     SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(fData));
     SkASSERT(codec);
 #endif
 }
 
 const char* CodecBench::onGetName() {
     return fName.c_str();
 }
@@ skipping 27 matching lines @@
         codec.reset(SkCodec::NewFromData(fData));
 #ifdef SK_DEBUG
         const SkCodec::Result result =
 #endif
         codec->getPixels(fInfo, fPixelStorage.get(), fInfo.minRowBytes(),
                          nullptr, colorTable, &colorCount);
         SkASSERT(result == SkCodec::kSuccess
                  || result == SkCodec::kIncompleteInput);
     }
 }