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

services/media/framework/models/lpcm_frame_buffer.cc

Index: services/media/framework/models/lpcm_frame_buffer.cc
diff --git a/services/media/framework/models/lpcm_frame_buffer.cc b/services/media/framework/models/lpcm_frame_buffer.cc
deleted file mode 100644
index a99696cecd9176ed098c881a909313b5b6582d26..0000000000000000000000000000000000000000
--- a/services/media/framework/models/lpcm_frame_buffer.cc
+++ /dev/null
@@ -1,19 +0,0 @@
-// 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 "services/media/framework/models/lpcm_frame_buffer.h"
-
-namespace mojo {
-namespace media {
-
-LpcmFrameBuffer::LpcmFrameBuffer() :
-    bytes_per_frame_(0),
-    remaining_buffer_(nullptr),
-    remaining_frame_count_(0),
-    exhausted_callback_(nullptr) {}
-
-LpcmFrameBuffer::~LpcmFrameBuffer() {}
-
-}  // namespace media
-}  // namespace mojo