Manage MIDI related objects and sessions' lifecycles correctly

content/renderer/media/renderer_webmidiaccessor_impl.cc

 // Copyright (c) 2013 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 "content/renderer/media/renderer_webmidiaccessor_impl.h"
 
 #include "base/logging.h"
 #include "content/renderer/media/midi_message_filter.h"
 #include "content/renderer/render_thread_impl.h"
 
 namespace content {
 
 RendererWebMIDIAccessorImpl::RendererWebMIDIAccessorImpl(
     blink::WebMIDIAccessorClient* client)
     : client_(client) {
   DCHECK(client_);
 }
 
 RendererWebMIDIAccessorImpl::~RendererWebMIDIAccessorImpl() {
   midi_message_filter()->RemoveClient(client_);
 }
 
 void RendererWebMIDIAccessorImpl::startSession() {
-  midi_message_filter()->StartSession(client_);
+  midi_message_filter()->AddClient(client_);
 }
 
 void RendererWebMIDIAccessorImpl::sendMIDIData(
     unsigned port_index,
     const unsigned char* data,
     size_t length,
     double timestamp) {
   midi_message_filter()->SendMidiData(
       port_index,
       data,
       length,
       timestamp);
 }
 
 MidiMessageFilter* RendererWebMIDIAccessorImpl::midi_message_filter() {
   return RenderThreadImpl::current()->midi_message_filter();
 }
 
 }  // namespace content