Make MediaSession available on Desktop

content/browser/media/session/browser_media_session_manager.h

Index: content/browser/media/session/browser_media_session_manager.h
diff --git a/content/browser/media/android/browser_media_session_manager.h b/content/browser/media/session/browser_media_session_manager.h
similarity index 76%
rename from content/browser/media/android/browser_media_session_manager.h
rename to content/browser/media/session/browser_media_session_manager.h
index 9d9253b39c8f35e9ab017aa0d1dd2960a4286673..0030f99774304a46aea2f001c231335f4e7b662d 100644
--- a/content/browser/media/android/browser_media_session_manager.h
+++ b/content/browser/media/session/browser_media_session_manager.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_BROWSER_MEDIA_ANDROID_BROWSER_MEDIA_SESSION_MANAGER_H_
-#define CONTENT_BROWSER_MEDIA_ANDROID_BROWSER_MEDIA_SESSION_MANAGER_H_
+#ifndef CONTENT_BROWSER_MEDIA_SESSION_BROWSER_MEDIA_SESSION_MANAGER_H_
+#define CONTENT_BROWSER_MEDIA_SESSION_BROWSER_MEDIA_SESSION_MANAGER_H_
 
 #include "base/macros.h"
 #include "base/optional.h"
@@ -21,6 +21,7 @@ struct MediaMetadata;
 class CONTENT_EXPORT BrowserMediaSessionManager {
  public:
   explicit BrowserMediaSessionManager(RenderFrameHost* render_frame_host);
+  virtual ~BrowserMediaSessionManager() = default;
 
   virtual void OnSetMetadata(int session_id,
                              const base::Optional<MediaMetadata>& metadata);
@@ -33,4 +34,4 @@ class CONTENT_EXPORT BrowserMediaSessionManager {
 
 }  // namespace content
 
-#endif  // CONTENT_BROWSER_MEDIA_ANDROID_BROWSER_MEDIA_SESSION_MANAGER_H_
+#endif  // CONTENT_BROWSER_MEDIA_SESSION_BROWSER_MEDIA_SESSION_MANAGER_H_