NOT FOR LANDING Implement WebMediaSession

content/browser/media/android/browser_media_session_manager.cc

 // Copyright 2015 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/browser_media_session_manager.h"
 
 #include "content/common/media/media_session_messages_android.h"
 #include "content/public/browser/render_frame_host.h"
 
 namespace content {
 
 BrowserMediaSessionManager::BrowserMediaSessionManager(
     RenderFrameHost* render_frame_host)
     : render_frame_host_(render_frame_host) {}
 
+MediaSession* BrowserMediaSessionManager::GetSession(int session_id) {
+  WebContents* web_contents =
+      WebContents::FromRenderFrameHost(render_frame_host_);
+
+  if (session_id == 0)
+    return MediaSession::Get(web_contents);
+
+  for (ScopedVector<MediaSession>::iterator it = sessions_.begin();
+       it != sessions_.end(); ++it) {
+    if ((*it)->session_id() == session_id)
+      return *it;
+  }
+
+  MediaSession* session = MediaSession::Create(web_contents, session_id);
+  sessions_.push_back(session);
+  return session;
+}
+
 void BrowserMediaSessionManager::OnActivate(int session_id, int request_id) {
-  NOTIMPLEMENTED();
-  Send(new MediaSessionMsg_DidActivate(GetRoutingID(), request_id, false));
+  bool success = GetSession(session_id)->Activate();
+  Send(new MediaSessionMsg_DidActivate(GetRoutingID(), request_id, success));
 }
 
 void BrowserMediaSessionManager::OnDeactivate(int session_id, int request_id) {
-  NOTIMPLEMENTED();
+  if (MediaSession* media_session = GetSession(session_id))
+    media_session->Deactivate();
   Send(new MediaSessionMsg_DidDeactivate(GetRoutingID(), request_id));
 }
 
 int BrowserMediaSessionManager::GetRoutingID() const {
   return render_frame_host_->GetRoutingID();
 }
 
+void BrowserMediaSessionManager::RemovePlayers(MediaSessionObserver* observer) {
+  // Remove observer from default session and user created sessions.
+
+  WebContents* web_contents =
+      WebContents::FromRenderFrameHost(render_frame_host_);
+  MediaSession::Get(web_contents)->RemovePlayers(observer);
+
+  for (ScopedVector<MediaSession>::iterator it = sessions_.begin();
+       it != sessions_.end(); ++it)
+    (*it)->RemovePlayers(observer);
+}
+
+void BrowserMediaSessionManager::RemovePlayer(MediaSessionObserver* observer,
+                                              int player_id) {
+  WebContents* web_contents =
+      WebContents::FromRenderFrameHost(render_frame_host_);
+  MediaSession::Get(web_contents)->RemovePlayer(observer, player_id);
+
+  for (ScopedVector<MediaSession>::iterator it = sessions_.begin();
+       it != sessions_.end(); ++it)
+    (*it)->RemovePlayer(observer, player_id);
+}
+
+void BrowserMediaSessionManager::OnPlayerPaused(MediaSessionObserver* observer,
+                                                int player_id) {
+  WebContents* web_contents =
+      WebContents::FromRenderFrameHost(render_frame_host_);
+  MediaSession::Get(web_contents)->OnPlayerPaused(observer, player_id);
+
+  for (ScopedVector<MediaSession>::iterator it = sessions_.begin();
+       it != sessions_.end(); ++it)
+    (*it)->OnPlayerPaused(observer, player_id);
+}
+
 bool BrowserMediaSessionManager::Send(IPC::Message* msg) {
   return render_frame_host_->Send(msg);
 }
 
 }  // namespace content