Add SkEncodedInfo to report properties of encoded image data

src/codec/SkGifCodec.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 "SkColorSpace.h"
 #include "SkColorTable.h"
@@ skipping 164 matching lines @@
     /*
      * Frees any extension data used in the decode
      * Used in a SkAutoTCallVProc
      */
     static void FreeExtension(SavedImage* image);
 
     /*
      * Creates an instance of the decoder
      * Called only by NewFromStream
      *
-     * @param srcInfo contains the source width and height
+     * @param info contains properties of the encoded data
      * @param stream the stream of image data
      * @param gif pointer to library type that manages gif decode
      *            takes ownership
      * @param transIndex  The transparent index.  An invalid value
      *            indicates that there is no transparent index.
      */
-    SkGifCodec(const SkImageInfo& srcInfo, SkStream* stream, GifFileType* gif, uint32_t transIndex,
-            const SkIRect& frameRect, bool frameIsSubset);
+    SkGifCodec(int width, int height, const SkEncodedInfo& info, SkStream* stream,
+            GifFileType* gif, uint32_t transIndex, const SkIRect& frameRect, bool frameIsSubset);
 
     SkAutoTCallVProc<GifFileType, CloseGif> fGif; // owned
     SkAutoTDeleteArray<uint8_t>             fSrcBuffer;
     const SkIRect                           fFrameRect;
     const uint32_t                          fTransIndex;
     uint32_t                                fFillIndex;
     const bool                              fFrameIsSubset;
     SkAutoTDelete<SkSwizzler>               fSwizzler;
     SkAutoTUnref<SkColorTable>              fColorTable;
 
     typedef SkCodec INHERITED;
 };