Fill incomplete images in SkCodec parent class

tools/SkBitmapRegionDecoderInterface.cpp

Index: tools/SkBitmapRegionDecoderInterface.cpp
diff --git a/tools/SkBitmapRegionDecoderInterface.cpp b/tools/SkBitmapRegionDecoderInterface.cpp
index 090f042ce34517c45324704536c4ae0b8ac76be0..746142d509b414aace4c9e2ef6dc3c3ba755b8e2 100644
--- a/tools/SkBitmapRegionDecoderInterface.cpp
+++ b/tools/SkBitmapRegionDecoderInterface.cpp
@@ -29,7 +29,7 @@ SkBitmapRegionDecoderInterface* SkBitmapRegionDecoderInterface::CreateBitmapRegi
             return new SkBitmapRegionSampler(decoder, width, height);
         }
         case kCanvas_Strategy: {
-            SkScanlineDecoder* decoder = SkScanlineDecoder::NewFromStream(stream);
+            SkAutoTDelete<SkScanlineDecoder> decoder = SkScanlineDecoder::NewFromStream(stream);
             if (nullptr == decoder) {
                 SkDebugf("Error: Failed to create decoder.\n");
                 return nullptr;
@@ -42,7 +42,7 @@ SkBitmapRegionDecoderInterface* SkBitmapRegionDecoderInterface::CreateBitmapRegi
                     SkDebugf("Error: Scanline ordering not supported.\n");
                     return nullptr;
             }
-            return new SkBitmapRegionCanvas(decoder);
+            return new SkBitmapRegionCanvas(decoder.detach());
         }
         default:
             SkASSERT(false);