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 565519acc8daab83112f947472cff340a6cff06d..8f570f4c5d2c415e0fe5b11fedccc3527b6e75a4 100644
--- a/src/images/SkImageDecoder_FactoryDefault.cpp
+++ b/src/images/SkImageDecoder_FactoryDefault.cpp
@@ -11,17 +11,17 @@
 #include "SkStream.h"
 #include "SkTRegistry.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);