Revert of Delete SkImageDecoder

src/images/SkImageDecoder_FactoryDefault.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
+#include "SkImageDecoder.h"
 #include "SkMovie.h"
 #include "SkStream.h"
 
+extern SkImageDecoder* image_decoder_from_stream(SkStreamRewindable*);
+
+SkImageDecoder* SkImageDecoder::Factory(SkStreamRewindable* stream) {
+    return image_decoder_from_stream(stream);
+}
+
+/////////////////////////////////////////////////////////////////////////
+
 typedef SkTRegistry<SkMovie*(*)(SkStreamRewindable*)> MovieReg;
 
 SkMovie* SkMovie::DecodeStream(SkStreamRewindable* stream) {
     const MovieReg* curr = MovieReg::Head();
     while (curr) {
         SkMovie* movie = curr->factory()(stream);
         if (movie) {
             return movie;
         }
         // we must rewind only if we got nullptr, since we gave the stream to the
         // movie, who may have already started reading from it
         stream->rewind();
         curr = curr->next();
     }
     return nullptr;
 }