SkPixelSerializer: support indexed pixels

include/core/SkImage.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImage_DEFINED
 #define SkImage_DEFINED
 
@@ skipping 249 matching lines @@
      *  Note: this will attempt to encode the image's pixels in the specified format,
      *  even if the image returns a data from refEncoded(). That data will be ignored.
      */
     SkData* encode(SkImageEncoder::Type, int quality) const;
 
     /**
      *  Encode the image and return the result as a caller-managed SkData.  This will
      *  attempt to reuse existing encoded data (as returned by refEncoded).
      *
      *  We defer to the SkPixelSerializer both for vetting existing encoded data
-     *  (useEncodedData) and for encoding the image (encodePixels) when no such data is
+     *  (useEncodedData) and for encoding the image (encode) when no such data is
      *  present or is rejected by the serializer.
      *
      *  If not specified, we use a default serializer which 1) always accepts existing data
      *  (in any format) and 2) encodes to PNG.
      *
      *  If no compatible encoded data exists and encoding fails, this method will also
      *  fail (return NULL).
      */
     SkData* encode(SkPixelSerializer* = nullptr) const;
 
@@ skipping 70 matching lines @@
 
 private:
     const int       fWidth;
     const int       fHeight;
     const uint32_t  fUniqueID;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif