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

services/media/framework/parts/reader.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/logging.h"
 #include "services/media/framework/parts/file_reader.h"
 #include "services/media/framework/parts/reader.h"
 #include "url/gurl.h"
 
 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();
   }
   // TODO(dalesat): More schemes.
 
   if (reader == nullptr) {
     return Result::kUnsupportedOperation;
   }
 
   Result result = reader->Init(gurl);
   if (result == Result::kOk) {
     *reader_out = reader;
   }
 
   return result;
 }
 
 } // namespace media
 } // namespace mojo