Motown: Remove LPCM optimizations, fix prepare, add flush, add ActiveMultistreamSink model/stage

services/media/framework/parts/reader.cc

Index: services/media/framework/parts/reader.cc
diff --git a/services/media/framework/parts/reader.cc b/services/media/framework/parts/reader.cc
index 31da7fcc06802076bd374afb39a8d6e5203254b7..d1d992ead3bde8cbf06e5870ed683a7bfc1f8dea 100644
--- a/services/media/framework/parts/reader.cc
+++ b/services/media/framework/parts/reader.cc
@@ -10,12 +10,12 @@
 namespace mojo {
 namespace media {
 
-Result Reader::Create(const GURL& gurl, ReaderPtr* reader_out) {
+Result Reader::Create(const GURL& gurl, std::shared_ptr<Reader>* reader_out) {
   if (!gurl.is_valid()) {
     return Result::kInvalidArgument;
   }
 
-  ReaderPtr reader = nullptr;
+  std::shared_ptr<Reader> reader = nullptr;
   if (gurl.SchemeIsFile()) {
     reader = FileReader::Create();
   }