Update Skia's YUV API

src/codec/SkCodecImageGenerator.h

 /*
  * 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 "SkCodec.h"
 #include "SkData.h"
 #include "SkImageGenerator.h"
 
 class SkCodecImageGenerator : public SkImageGenerator {
 public:
     /*
      * If this data represents an encoded image that we know how to decode,
      * return an SkCodecImageGenerator.  Otherwise return nullptr.
      *
      * Refs the data if an image generator can be returned.  Otherwise does
      * not affect the data.
      */
     static SkImageGenerator* NewFromEncodedCodec(SkData* data);
 
 protected:
     SkData* onRefEncodedData(SK_REFENCODEDDATA_CTXPARAM) override;
 
     bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, SkPMColor ctable[],
             int* ctableCount) override;
 
-    bool onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
-            SkYUVColorSpace* colorSpace) override;
+    bool onQueryYUV8(SkYUVSizeInfo*, SkYUVColorSpace*) const override;
+
+    bool onGetYUV8Planes(const SkYUVSizeInfo&, void* planes[3]) override;
 
 private:
     /*
      * Takes ownership of codec
      * Refs the data
      */
     SkCodecImageGenerator(SkCodec* codec, SkData* data);
 
     SkAutoTDelete<SkCodec> fCodec;
     SkAutoTUnref<SkData> fData;
 
-    // FIXME: These fields are necessary only until we change the API of SkImageGenerator
-    //        to match SkCodec.  Once the API is changed, they should be removed.
-    int fYWidth;
-    int fUWidth;
-    int fVWidth;
-
     typedef SkImageGenerator INHERITED;
 };