Web MIDI API back-end (work-in-progress)

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 "content/renderer/media/midi_message_filter.h"
+#include "base/logging.h"
+
+namespace content {
+
+RendererWebMIDIAccessorImpl::RendererWebMIDIAccessorImpl(
+    WebKit::WebMIDIAccessor::Client* client)
+    : client_(client) {
+  DCHECK(client_);
+  midi_message_filter()->AddClient(client_);
+}
+
+RendererWebMIDIAccessorImpl::~RendererWebMIDIAccessorImpl() {
+  midi_message_filter()->RemoveClient(client_);
+}
+
+MIDIMessageFilter* RendererWebMIDIAccessorImpl::midi_message_filter() {
+  return MIDIMessageFilter::Get();
+}
+
+}  // namespace content