Fill incomplete images in SkCodec parent class

src/codec/SkBmpRLECodec.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 "SkBmpCodec.h"
 #include "SkColorTable.h"
 #include "SkImageInfo.h"
@@ skipping 63 matching lines @@
     void setPixel(void* dst, size_t dstRowBytes,
                   const SkImageInfo& dstInfo, uint32_t x, uint32_t y,
                   uint8_t index);
     /*
      * Set an RLE24 pixel from R, G, B values
      */
     void setRGBPixel(void* dst, size_t dstRowBytes,
                      const SkImageInfo& dstInfo, uint32_t x, uint32_t y,
                      uint8_t red, uint8_t green, uint8_t blue);
 
-    Result decodeRows(const SkImageInfo& dstInfo, void* dst, size_t dstRowBytes,
-                      const Options& opts) override;
+    uint32_t decodeRows(const SkImageInfo& dstInfo, void* dst, size_t dstRowBytes,
+            const Options& opts) override;
 
     SkAutoTUnref<SkColorTable>          fColorTable;    // owned
     const uint32_t                      fNumColors;
     const uint32_t                      fBytesPerColor;
     const uint32_t                      fOffset;
     SkAutoTDeleteArray<uint8_t>         fStreamBuffer;
     size_t                              fRLEBytes;
     uint32_t                            fCurrRLEByte;
     int                                 fSampleX;
 
     typedef SkBmpCodec INHERITED;
 };