instantiationService: add missing api for syncDescriptor creation

src/vs/platform/instantiation/common/instantiation.ts

@@ -142,6 +142,8 @@ export interface IInstantiationService {
 	createInstance<A1, A2, A3, A4, A5, A6, A7, T>(ctor: IConstructorSignature7<A1, A2, A3, A4, A5, A6, A7, T>, first: A1, second: A2, third: A3, fourth: A4, fifth: A5, sixth: A6, seventh: A7): T;
 	createInstance<A1, A2, A3, A4, A5, A6, A7, A8, T>(ctor: IConstructorSignature8<A1, A2, A3, A4, A5, A6, A7, A8, T>, first: A1, second: A2, third: A3, fourth: A4, fifth: A5, sixth: A6, seventh: A7, eigth: A8): T;
 
+	createInstance<T>(descriptor: descriptors.SyncDescriptor<T>, ...args: any[]): T;
+
 	/**
 	 * Asynchronously creates an instance that is denoted by
 	 * the descriptor

src/vs/platform/instantiation/common/instantiationService.ts

@@ -278,6 +278,7 @@ class InstantiationService implements IInstantiationService {
 	createInstance<A1, A2, A3, A4, A5, A6, A7, T>(descriptor: descriptors.AsyncDescriptor7<A1, A2, A3, A4, A5, A6, A7, T>, a1: A1, a2: A2, a3: A3, a4: A4, a5: A5, a6: A6, a7: A7): winjs.TPromise<T>;
 	createInstance<A1, A2, A3, A4, A5, A6, A7, A8, T>(descriptor: descriptors.AsyncDescriptor8<A1, A2, A3, A4, A5, A6, A7, A8, T>, a1: A1, a2: A2, a3: A3, a4: A4, a5: A5, a6: A6, a7: A7, a8: A8): winjs.TPromise<T>;
 
+	createInstance<T>(descriptor: descriptors.SyncDescriptor<T>, ...args: any[]): T;
 	createInstance<T>(descriptor: descriptors.AsyncDescriptor<T>, ...args: any[]): winjs.TPromise<T>;
 
 	createInstance<T>(param: any): any {