Change SkImageDecoders to take an SkStreamRewindable.

src/images/SkImageDecoder_FactoryDefault.cpp

Index: src/images/SkImageDecoder_FactoryDefault.cpp
diff --git a/src/images/SkImageDecoder_FactoryDefault.cpp b/src/images/SkImageDecoder_FactoryDefault.cpp
index 247f57180028cf7051d55fa2ac73130ab8ca0fe6..e959c8b69b8144ca0b501e77fd8d5a0e965e9a8a 100644
--- a/src/images/SkImageDecoder_FactoryDefault.cpp
+++ b/src/images/SkImageDecoder_FactoryDefault.cpp
@@ -10,17 +10,17 @@
 #include "SkMovie.h"
 #include "SkStream.h"
 
-extern SkImageDecoder* image_decoder_from_stream(SkStream*);
+extern SkImageDecoder* image_decoder_from_stream(SkStreamRewindable*);
 
-SkImageDecoder* SkImageDecoder::Factory(SkStream* stream) {
+SkImageDecoder* SkImageDecoder::Factory(SkStreamRewindable* stream) {
     return image_decoder_from_stream(stream);
 }
 
 /////////////////////////////////////////////////////////////////////////
 
-typedef SkTRegistry<SkMovie*(*)(SkStream*)> MovieReg;
+typedef SkTRegistry<SkMovie*(*)(SkStreamRewindable*)> MovieReg;
 
-SkMovie* SkMovie::DecodeStream(SkStream* stream) {
+SkMovie* SkMovie::DecodeStream(SkStreamRewindable* stream) {
     const MovieReg* curr = MovieReg::Head();
     while (curr) {
         SkMovie* movie = curr->factory()(stream);