SkScaledCodec should implement onRewind()

src/codec/SkScaledCodec.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 "SkCodecPriv.h"
 #include "SkScaledCodec.h"
 #include "SkStream.h"
@@ skipping 26 matching lines @@
     return NewFromStream(new SkMemoryStream(data));
 }
 
 SkScaledCodec::SkScaledCodec(SkCodec* codec)
     : INHERITED(codec->getInfo(), nullptr)
     , fCodec(codec)
 {}
 
 SkScaledCodec::~SkScaledCodec() {}
 
+bool SkScaledCodec::onRewind() {
+    return fCodec->onRewind();
+}
+
 static SkISize best_scaled_dimensions(const SkISize& origDims, const SkISize& nativeDims,
                                       const SkISize& scaledCodecDims, float desiredScale) {
     if (nativeDims == scaledCodecDims) {
         // does not matter which to return if equal. Return here to skip below calculations
         return nativeDims;
     }
     float idealWidth = origDims.width() * desiredScale;
     float idealHeight = origDims.height() * desiredScale;
 
     // calculate difference between native dimensions and ideal dimensions
@@ skipping 235 matching lines @@
                 storagePtr += sampleY * rowBytes;
                 dst = SkTAddOffset<void>(dst, rowBytes);
             }
             return result;
         }
         default:
             SkASSERT(false);
             return kUnimplemented;
     }
 }