Fix TS 2.4 Error in textFileService.ts (fixes #30213)

src/vs/workbench/parts/files/browser/fileActions.ts

@@ -1674,7 +1674,7 @@ export class RevertFileAction extends Action {
 		}
 
 		if (resource && resource.scheme !== 'untitled') {
-			return this.textFileService.revert(resource, true /* force */);
+			return this.textFileService.revert(resource, { force: true });
 		}
 
 		return TPromise.as(true);

src/vs/workbench/services/textfile/common/textfiles.ts

@@ -293,7 +293,7 @@ export interface ITextFileService extends IDisposable {
 	 * @param resource the resource of the file to revert.
 	 * @param force to force revert even when the file is not dirty
 	 */
-	revert(resource: URI, force?: boolean): TPromise<boolean>;
+	revert(resource: URI, options?: IRevertOptions): TPromise<boolean>;
 
 	/**
 	 * Reverts all the provided resources and returns a promise with the operation result.