Make MediaPlayerEventRouter a PKS to decouple it from ExtensionService

chrome/chrome_browser_chromeos.gypi

Index: chrome/chrome_browser_chromeos.gypi
diff --git a/chrome/chrome_browser_chromeos.gypi b/chrome/chrome_browser_chromeos.gypi
index 6f228bf54ffa80257d3b631707f892757866087a..59fd06fc5c1ba2b8e41f2a8a846bf4414863c7b3 100644
--- a/chrome/chrome_browser_chromeos.gypi
+++ b/chrome/chrome_browser_chromeos.gypi
@@ -661,14 +661,16 @@
             'browser/chromeos/extensions/input_method_api.h',
             'browser/chromeos/extensions/input_method_api_factory.cc',
             'browser/chromeos/extensions/input_method_api_factory.h',
+            'browser/chromeos/extensions/media_player_api.cc',
+            'browser/chromeos/extensions/media_player_api.h',
+            'browser/chromeos/extensions/media_player_api_factory.cc',
+            'browser/chromeos/extensions/media_player_api_factory.h',
             'browser/chromeos/extensions/wallpaper_manager_util.cc',
             'browser/chromeos/extensions/wallpaper_manager_util.h',
             'browser/chromeos/extensions/wallpaper_private_api.cc',
             'browser/chromeos/extensions/wallpaper_private_api.h',
             'browser/chromeos/extensions/zip_file_creator.cc',
             'browser/chromeos/extensions/zip_file_creator.h',
-            'browser/chromeos/media/media_player_extension_api.cc',
-            'browser/chromeos/media/media_player_extension_api.h',
           ],
         }],
         ['use_cras==1', {
@@ -695,8 +697,6 @@
         }],
         ['file_manager_extension==0', {
           'sources/': [
-            ['exclude', 'browser/chromeos/media/media_player_extension_api.cc'],
-            ['exclude', 'browser/chromeos/media/media_player_extension_api.h'],
             ['exclude', 'browser/chromeos/extensions/file_browser_handler_api.cc'],
             ['exclude', 'browser/chromeos/extensions/file_browser_handler_api.h'],
             ['exclude', 'browser/chromeos/extensions/file_browser_private_api.cc'],
@@ -705,6 +705,10 @@
             ['exclude', 'browser/chromeos/extensions/file_handler_util.cc'],
             ['exclude', 'browser/chromeos/extensions/file_manager_util.h'],
             ['exclude', 'browser/chromeos/extensions/file_manager_util.cc'],
+            ['exclude', 'browser/chromeos/extensions/media_player_api.cc'],
+            ['exclude', 'browser/chromeos/extensions/media_player_api.h'],
+            ['exclude', 'browser/chromeos/extensions/media_player_api_factory.cc'],
+            ['exclude', 'browser/chromeos/extensions/media_player_api_factory.h'],
             ['exclude', 'browser/chromeos/extensions/zip_file_creator.h'],
             ['exclude', 'browser/chromeos/extensions/zip_file_creator.cc'],
           ],