Make MediaSession available on Desktop

content/browser/media/android/media_session_service_impl.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 "content/browser/media/android/media_session_service_impl.h"
-
-#include "base/strings/utf_string_conversions.h"
-#include "content/browser/media/android/browser_media_session_manager.h"
-#include "content/browser/media/android/media_web_contents_observer_android.h"
-#include "content/browser/web_contents/web_contents_impl.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/web_contents.h"
-#include "content/public/common/media_metadata.h"
-
-namespace content {
-
-MediaSessionServiceImpl::MediaSessionServiceImpl(
-    RenderFrameHost* render_frame_host)
-    : render_frame_host_(render_frame_host) {}
-
-MediaSessionServiceImpl::~MediaSessionServiceImpl() = default;
-
-// static
-void MediaSessionServiceImpl::Create(
-    RenderFrameHost* render_frame_host,
-    blink::mojom::MediaSessionServiceRequest request) {
-  MediaSessionServiceImpl* impl =
-      new MediaSessionServiceImpl(render_frame_host);
-  impl->Bind(std::move(request));
-}
-
-void MediaSessionServiceImpl::SetMetadata(
-    const base::Optional<content::MediaMetadata>& metadata) {
-  WebContentsImpl* contents = static_cast<WebContentsImpl*>(
-      WebContents::FromRenderFrameHost(render_frame_host_));
-  DCHECK(contents);
-  MediaWebContentsObserverAndroid::FromWebContents(contents)
-      ->GetMediaSessionManager(render_frame_host_)
-      ->OnSetMetadata(0, metadata);
-}
-
-void MediaSessionServiceImpl::Bind(
-    blink::mojom::MediaSessionServiceRequest request) {
-  binding_.reset(new mojo::Binding<blink::mojom::MediaSessionService>(
-      this, std::move(request)));
-}
-
-}  // namespace content