Add subsetting to SkScaledCodec

tools/SkBitmapRegionSampler.cpp

Index: tools/SkBitmapRegionSampler.cpp
diff --git a/tools/SkBitmapRegionSampler.cpp b/tools/SkBitmapRegionSampler.cpp
index 98c183daac617d58c86c4b60ab50807cf155dc7c..514af108593ffa6113233fe9cf807e376d8169fe 100644
--- a/tools/SkBitmapRegionSampler.cpp
+++ b/tools/SkBitmapRegionSampler.cpp
@@ -6,6 +6,7 @@
  */
 
 #include "SkBitmapRegionSampler.h"
+#include "SkCodecPriv.h"
 
 SkBitmapRegionSampler::SkBitmapRegionSampler(SkImageDecoder* decoder, int width, 
                                              int height)
@@ -43,7 +44,7 @@ SkBitmap* SkBitmapRegionSampler::decodeRegion(int start_x, int start_y,
 
     SkAutoTDelete<SkBitmap> bitmap(new SkBitmap());
     if (!fDecoder->decodeSubset(bitmap.get(), region, prefColorType)) {
-        SkDebugf("Error: decodeRegion failed.\n");
+        SkCodecPrintf("Error: decodeRegion failed.\n");
         return nullptr;
     }
     return bitmap.detach();