Make MediaSession a runtime-enabled feature on Desktop.

content/browser/media/android/media_web_contents_observer_android.cc

Index: content/browser/media/android/media_web_contents_observer_android.cc
diff --git a/content/browser/media/android/media_web_contents_observer_android.cc b/content/browser/media/android/media_web_contents_observer_android.cc
index 29f4b18161fd055ce6d162e6fddb5298dd99aa0c..cb3d53496c9a8958be03e9fa48d65a5fa93474c7 100644
--- a/content/browser/media/android/media_web_contents_observer_android.cc
+++ b/content/browser/media/android/media_web_contents_observer_android.cc
@@ -6,9 +6,6 @@
 
 #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"
@@ -72,19 +69,6 @@ void MediaWebContentsObserverAndroid::SuspendAllMediaPlayers() {
       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();
@@ -98,13 +82,6 @@ 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);
@@ -124,10 +101,6 @@ void MediaWebContentsObserverAndroid::RenderFrameDeleted(
 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;
 
@@ -143,19 +116,6 @@ bool MediaWebContentsObserverAndroid::OnMessageReceived(
   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) {
@@ -269,59 +229,4 @@ void MediaWebContentsObserverAndroid::OnSetCdm(
   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