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

services/media/framework/parts/file_reader.h

 // 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.
 
 #ifndef SERVICES_MEDIA_FRAMEWORK_PARTS_FILE_READER_H_
 #define SERVICES_MEDIA_FRAMEWORK_PARTS_FILE_READER_H_
 
 #include "services/media/framework/parts/reader.h"
 
 namespace mojo {
 namespace media {
 
 // Reads raw data from a file.
 class FileReader : public Reader {
  public:
-  static ReaderPtr Create() {
-    return ReaderPtr(new FileReader());
+  static std::shared_ptr<Reader> Create() {
+    return std::shared_ptr<Reader>(new FileReader());
   }
 
   ~FileReader() override;
 
   // Reader implementation.
   Result Init(const GURL& gurl) override;
 
   size_t Read(uint8* buffer, int bytes_to_read) override;
 
   int64_t GetPosition() const override;
 
   int64_t SetPosition(int64 position) override;
 
   size_t GetSize() const override;
 
   bool CanSeek() const override;
 
  private:
   FileReader() {}
 
   FILE* file_;
   int64 size_;
 };
 
 }  // namespace media
 }  // namespace mojo
 
 #endif // SERVICES_MEDIA_FRAMEWORK_PARTS_FILE_READER_H_