Add a simple one shot and repeating timer API for Mojo.js.

gin/modules/module_registry.h

Index: gin/modules/module_registry.h
diff --git a/gin/modules/module_registry.h b/gin/modules/module_registry.h
index 27606cd9a5460d4ac2e4d5c45c5c301840155a77..755875c3539dc9290d456b42bcb51553febe08b8 100644
--- a/gin/modules/module_registry.h
+++ b/gin/modules/module_registry.h
@@ -43,9 +43,8 @@ class GIN_EXPORT ModuleRegistry : public ContextSupplement {
                               v8::Handle<v8::ObjectTemplate> templ);
 
   // The caller must have already entered our context.
-  void AddBuiltinModule(v8::Isolate* isolate,
-                        const std::string& id,
-                        v8::Handle<v8::ObjectTemplate> templ);
+  void AddBuiltinModule(v8::Isolate* isolate, const std::string& id,
+                        v8::Handle<v8::Value> module);
 
   // The caller must have already entered our context.
   void AddPendingModule(v8::Isolate* isolate,