Fixing naming issues in MediaSession

content/browser/BUILD.gn

Index: content/browser/BUILD.gn
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index 534bf7f3492d9234b6fd0a3ec846e47f4716172d..004312734d637fa38543a7ae83ea74b18babb23e 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -848,6 +848,10 @@ source_set("browser") {
     "media/media_web_contents_observer.h",
     "media/midi_host.cc",
     "media/midi_host.h",
+    "media/session/audio_focus_delegate.h",
+    "media/session/audio_focus_delegate_android.cc",
+    "media/session/audio_focus_delegate_android.h",
+    "media/session/audio_focus_delegate_default.cc",
     "media/session/audio_focus_manager.cc",
     "media/session/audio_focus_manager.h",
     "media/session/media_metadata_sanitizer.cc",
@@ -858,11 +862,7 @@ source_set("browser") {
     "media/session/media_session_controller.h",
     "media/session/media_session_controllers_manager.cc",
     "media/session/media_session_controllers_manager.h",
-    "media/session/media_session_delegate.h",
-    "media/session/media_session_delegate_android.cc",
-    "media/session/media_session_delegate_android.h",
-    "media/session/media_session_delegate_default.cc",
-    "media/session/media_session_observer.h",
+    "media/session/media_session_player_observer.h",
     "media/session/media_session_service_impl.cc",
     "media/session/media_session_service_impl.h",
     "media/session/media_session_uma_helper.cc",
@@ -1717,9 +1717,9 @@ source_set("browser") {
     sources -= [
       "browser_ipc_logging.cc",
       "device_sensors/data_fetcher_shared_memory_default.cc",
+      "media/session/audio_focus_delegate_default.cc",
       "media/session/audio_focus_manager.cc",
       "media/session/audio_focus_manager.h",
-      "media/session/media_session_delegate_default.cc",
       "power_usage_monitor_impl.cc",
       "power_usage_monitor_impl.h",
       "tracing/tracing_ui.cc",