Make MediaPlayerEventRouter a PKS to decouple it from ExtensionService

chrome/browser/profiles/profile_dependency_manager.cc

Index: chrome/browser/profiles/profile_dependency_manager.cc
diff --git a/chrome/browser/profiles/profile_dependency_manager.cc b/chrome/browser/profiles/profile_dependency_manager.cc
index 6ca46aaadfb449bb67620fedb067e8994ddad2e4..68f639c5d42ced6cf909110030afdb995fc24e92 100644
--- a/chrome/browser/profiles/profile_dependency_manager.cc
+++ b/chrome/browser/profiles/profile_dependency_manager.cc
@@ -88,6 +88,10 @@
 #include "chrome/browser/extensions/api/input_ime/input_ime_api_factory.h"
 #endif
 
+#if defined(OS_CHROMEOS) && defined(FILE_MANAGER_EXTENSION)
+#include "chrome/browser/chromeos/extensions/media_player_api_factory.h"
+#endif
+
 #if defined(USE_AURA)
 #include "chrome/browser/ui/gesture_prefs_observer_factory_aura.h"
 #endif
@@ -255,6 +259,9 @@ void ProfileDependencyManager::AssertFactoriesBuilt() {
 #endif
   extensions::ManagedModeAPIFactory::GetInstance();
   extensions::MediaGalleriesPrivateAPIFactory::GetInstance();
+#if defined(OS_CHROMEOS) && defined(FILE_MANAGER_EXTENSION)
+  extensions::MediaPlayerAPIFactory::GetInstance();
+#endif
   extensions::OmniboxAPIFactory::GetInstance();
   extensions::PreferenceAPIFactory::GetInstance();
   extensions::ProcessesAPIFactory::GetInstance();