Add SkEncodedInfo to report properties of encoded image data

src/codec/SkJpegCodec.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.
  */
 
 #ifndef SkJpegCodec_DEFINED
 #define SkJpegCodec_DEFINED
 
@@ skipping 68 matching lines @@
      * Ownership is unchanged when we set decoderMgrOut.
      *
      */
     static bool ReadHeader(SkStream* stream, SkCodec** codecOut,
             JpegDecoderMgr** decoderMgrOut);
 
     /*
      * Creates an instance of the decoder
      * Called only by NewFromStream
      *
-     * @param srcInfo contains the source width and height
+     * @param info contains the source width and height
      * @param stream the encoded image data
      * @param decoderMgr holds decompress struct, src manager, and error manager
      *                   takes ownership
      */
-    SkJpegCodec(const SkImageInfo& srcInfo, SkStream* stream, JpegDecoderMgr* decoderMgr,
+    SkJpegCodec(const SkEncodedInfo& info, SkStream* stream, JpegDecoderMgr* decoderMgr,
             sk_sp<SkColorSpace> colorSpace, Origin origin);
 
     /*
      * Checks if the conversion between the input image and the requested output
      * image has been implemented
      * Sets the output color space
      */
     bool setOutputColorSpace(const SkImageInfo& dst);
 
     // scanline decoding
@@ skipping 15 matching lines @@
     // libjpeg-turbo provides some subsetting.  In the case that libjpeg-turbo
     // cannot take the exact the subset that we need, we will use the swizzler
     // to further subset the output from libjpeg-turbo.
     SkIRect                    fSwizzlerSubset;
     SkAutoTDelete<SkSwizzler>  fSwizzler;
     
     typedef SkCodec INHERITED;
 };
 
 #endif