Make MediaSession available 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 ae785f30fd8fe1c31b4c27e2ba36efe869ec57e1..1ea8d00d5fbd538d146cd1fa99ecee6e59085bfd 100644
--- a/content/browser/media/android/media_web_contents_observer_android.cc
+++ b/content/browser/media/android/media_web_contents_observer_android.cc
@@ -8,7 +8,6 @@
 
 #include "base/memory/ptr_util.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/browser_surface_view_manager.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/media/media_player_delegate_messages.h"
@@ -54,19 +53,6 @@ MediaWebContentsObserverAndroid::GetMediaPlayerManager(
   return manager;
 }
 
-BrowserMediaSessionManager*
-MediaWebContentsObserverAndroid::GetMediaSessionManager(
-    RenderFrameHost* render_frame_host) {
-  auto it = media_session_managers_.find(render_frame_host);
-  if (it != media_session_managers_.end())
-    return it->second;
-
-  BrowserMediaSessionManager* manager =
-      new BrowserMediaSessionManager(render_frame_host);
-  media_session_managers_.set(render_frame_host, base::WrapUnique(manager));
-  return manager;
-}
-
 BrowserSurfaceViewManager*
 MediaWebContentsObserverAndroid::GetSurfaceViewManager(
     RenderFrameHost* render_frame_host) {
@@ -80,12 +66,6 @@ MediaWebContentsObserverAndroid::GetSurfaceViewManager(
   return manager;
 }
 
-void MediaWebContentsObserverAndroid::SetMediaSessionManagerForTest(
-    RenderFrameHost* render_frame_host,
-    std::unique_ptr<BrowserMediaSessionManager> manager) {
-  media_session_managers_.set(render_frame_host, std::move(manager));
-}
-
 void MediaWebContentsObserverAndroid::SuspendAllMediaPlayers() {
   web_contents()->ForEachFrame(
       base::Bind(&SuspendAllMediaPlayersInRenderFrame));
@@ -114,7 +94,6 @@ void MediaWebContentsObserverAndroid::RenderFrameDeleted(
   MediaWebContentsObserver::RenderFrameDeleted(render_frame_host);
 
   media_player_managers_.erase(render_frame_host);
-  media_session_managers_.erase(render_frame_host);
   surface_view_managers_.erase(render_frame_host);
 }