Make MediaSession a runtime-enabled feature on Desktop.

content/browser/media/android/media_web_contents_observer_android.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_web_contents_observer_android.h"
 
 #include "content/browser/media/android/browser_media_player_manager.h"
 #include "content/browser/media/android/browser_media_session_manager.h"
-#include "content/browser/media/android/media_session.h"
-#include "content/browser/media/android/media_session_controller.h"
-#include "content/browser/media/android/media_session_observer.h"
 #include "content/browser/media/cdm/browser_cdm_manager.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/media/media_player_delegate_messages.h"
 #include "content/common/media/media_player_messages_android.h"
 #include "content/common/media/media_session_messages_android.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "ipc/ipc_message_macros.h"
 #include "media/base/android/media_player_android.h"
 
@@ skipping 43 matching lines @@
       new BrowserMediaSessionManager(render_frame_host);
   media_session_managers_.set(render_frame_host, make_scoped_ptr(manager));
   return manager;
 }
 
 void MediaWebContentsObserverAndroid::SuspendAllMediaPlayers() {
   web_contents()->ForEachFrame(
       base::Bind(&SuspendAllMediaPlayersInRenderFrame));
 }
 
-bool MediaWebContentsObserverAndroid::RequestPlay(
-    RenderFrameHost* render_frame_host,
-    int delegate_id,
-    bool has_audio,
-    bool is_remote,
-    base::TimeDelta duration) {
-  // |has_video| forced to true since the value doesn't matter at present.
-  OnMediaPlaying(render_frame_host, delegate_id, true, has_audio, is_remote,
-                 duration);
-  return media_session_map_.find(MediaPlayerId(
-             render_frame_host, delegate_id)) != media_session_map_.end();
-}
-
 #if defined(VIDEO_HOLE)
 void MediaWebContentsObserverAndroid::OnFrameInfoUpdated() {
   for (auto it = media_player_managers_.begin();
        it != media_player_managers_.end(); ++it) {
     it->second->OnFrameInfoUpdated();
   }
 }
 #endif  // defined(VIDEO_HOLE)
 
 void MediaWebContentsObserverAndroid::RenderFrameDeleted(
     RenderFrameHost* render_frame_host) {
   MediaWebContentsObserver::RenderFrameDeleted(render_frame_host);
 
-  for (auto it = media_session_map_.begin(); it != media_session_map_.end();) {
-    if (it->first.first == render_frame_host)
-      it = media_session_map_.erase(it);
-    else
-      ++it;
-  }
-
   // Always destroy the media players before CDMs because we do not support
   // detaching CDMs from media players yet. See http://crbug.com/330324
   media_player_managers_.erase(render_frame_host);
   media_session_managers_.erase(render_frame_host);
 
   // TODO(xhwang): Currently MediaWebContentsObserver, BrowserMediaPlayerManager
   // and BrowserCdmManager all run on browser UI thread. So this call is okay.
   // In the future we need to support the case where MediaWebContentsObserver
   // get notified on browser UI thread, but BrowserMediaPlayerManager and
   // BrowserCdmManager run on a different thread.
   BrowserCdmManager* browser_cdm_manager =
       BrowserCdmManager::FromProcess(render_frame_host->GetProcess()->GetID());
   if (browser_cdm_manager)
     browser_cdm_manager->RenderFrameDeleted(render_frame_host->GetRoutingID());
 }
 
 bool MediaWebContentsObserverAndroid::OnMessageReceived(
     const IPC::Message& msg,
     RenderFrameHost* render_frame_host) {
-  // Receive play/pause/destroyed messages, but don't mark as processed so they
-  // are also handled by MediaWebContentsObserver.
-  OnMediaPlayerDelegateMessageReceived(msg, render_frame_host);
-
   if (MediaWebContentsObserver::OnMessageReceived(msg, render_frame_host))
     return true;
 
   if (OnMediaPlayerMessageReceived(msg, render_frame_host))
     return true;
 
   if (OnMediaPlayerSetCdmMessageReceived(msg, render_frame_host))
     return true;
 
   if (OnMediaSessionMessageReceived(msg, render_frame_host))
     return true;
 
   return false;
 }
 
-void MediaWebContentsObserverAndroid::OnMediaPlayerDelegateMessageReceived(
-    const IPC::Message& msg,
-    RenderFrameHost* render_frame_host) {
-  IPC_BEGIN_MESSAGE_MAP_WITH_PARAM(MediaWebContentsObserverAndroid, msg,
-                                   render_frame_host)
-    IPC_MESSAGE_HANDLER(MediaPlayerDelegateHostMsg_OnMediaDestroyed,
-                        OnMediaDestroyed)
-    IPC_MESSAGE_HANDLER(MediaPlayerDelegateHostMsg_OnMediaPaused, OnMediaPaused)
-    IPC_MESSAGE_HANDLER(MediaPlayerDelegateHostMsg_OnMediaPlaying,
-                        OnMediaPlaying)
-  IPC_END_MESSAGE_MAP()
-}
-
 bool MediaWebContentsObserverAndroid::OnMediaPlayerMessageReceived(
     const IPC::Message& msg,
     RenderFrameHost* render_frame_host) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(MediaWebContentsObserverAndroid, msg)
     IPC_MESSAGE_FORWARD(MediaPlayerHostMsg_EnterFullscreen,
                         GetMediaPlayerManager(render_frame_host),
                         BrowserMediaPlayerManager::OnEnterFullscreen)
     IPC_MESSAGE_FORWARD(MediaPlayerHostMsg_Initialize,
                         GetMediaPlayerManager(render_frame_host),
@@ skipping 93 matching lines @@
   if (!cdm) {
     NOTREACHED() << "OnSetCdm: CDM not found for " << cdm_id;
     return;
   }
 
   // TODO(xhwang): This could possibly fail. In that case we should reject the
   // promise.
   media_player->SetCdm(cdm);
 }
 
-void MediaWebContentsObserverAndroid::OnMediaDestroyed(
-    RenderFrameHost* render_frame_host,
-    int delegate_id) {
-  media_session_map_.erase(MediaPlayerId(render_frame_host, delegate_id));
-}
-
-void MediaWebContentsObserverAndroid::OnMediaPaused(
-    RenderFrameHost* render_frame_host,
-    int delegate_id,
-    bool reached_end_of_stream) {
-  // Drop the session if playback completes normally.
-  if (reached_end_of_stream) {
-    OnMediaDestroyed(render_frame_host, delegate_id);
-    return;
-  }
-
-  auto it =
-      media_session_map_.find(MediaPlayerId(render_frame_host, delegate_id));
-  if (it == media_session_map_.end())
-    return;
-
-  it->second->OnPlaybackPaused();
-}
-
-void MediaWebContentsObserverAndroid::OnMediaPlaying(
-    RenderFrameHost* render_frame_host,
-    int delegate_id,
-    bool has_video,
-    bool has_audio,
-    bool is_remote,
-    base::TimeDelta duration) {
-  const MediaPlayerId id(render_frame_host, delegate_id);
-
-  // Since we don't remove session instances on pause, there may be an existing
-  // instance for this playback attempt.
-  //
-  // In this case, try to reinitialize it with the new settings.  If they are
-  // the same, this is a no-op.  If the reinitialize fails, destroy the
-  // controller. A later playback attempt will create a new controller.
-  auto it = media_session_map_.find(id);
-  if (it != media_session_map_.end()) {
-    if (!it->second->Initialize(has_audio, is_remote, duration))
-      media_session_map_.erase(it);
-    return;
-  }
-
-  scoped_ptr<MediaSessionController> controller(
-      new MediaSessionController(id, this));
-
-  if (!controller->Initialize(has_audio, is_remote, duration))
-    return;
-
-  media_session_map_[id] = std::move(controller);
-}
-
 }  // namespace content