switch mediaGalleries to .idl api definition

chrome/browser/extensions/extension_function_registry.cc

Index: chrome/browser/extensions/extension_function_registry.cc
diff --git a/chrome/browser/extensions/extension_function_registry.cc b/chrome/browser/extensions/extension_function_registry.cc
index b62f1c00ac69d46b5b55391fd3f69457f6744773..c3f16bc8532f82030bd824b6574b2d388c749d47 100644
--- a/chrome/browser/extensions/extension_function_registry.cc
+++ b/chrome/browser/extensions/extension_function_registry.cc
@@ -18,7 +18,6 @@
 #include "chrome/browser/extensions/api/extension_action/extension_page_actions_api.h"
 #include "chrome/browser/extensions/api/extension_action/extension_script_badge_api.h"
 #include "chrome/browser/extensions/api/managed_mode/managed_mode_api.h"
-#include "chrome/browser/extensions/api/media_gallery/media_gallery_api.h"
 #include "chrome/browser/extensions/api/metrics/metrics.h"
 #include "chrome/browser/extensions/api/offscreen_tabs/offscreen_tabs_api.h"
 #include "chrome/browser/extensions/api/omnibox/omnibox_api.h"
@@ -491,11 +490,6 @@ void ExtensionFunctionRegistry::ResetFunctions() {
   // Runtime
   RegisterFunction<extensions::RuntimeGetBackgroundPageFunction>();
 
-  // Media Gallery
-  RegisterFunction<extensions::GetMediaFileSystemsFunction>();
-  RegisterFunction<extensions::OpenMediaGalleryManagerFunction>();
-  RegisterFunction<extensions::AssembleMediaFileFunction>();
-
   // Generated APIs
   extensions::api::GeneratedFunctionRegistry::RegisterAll(this);
 #endif  // defined(ENABLE_EXTENSIONS)