Merge from vscode 2a36b7d0d527bf408bae4f96b8386db9d9455113 (#10237)

src/vs/platform/windows/common/windows.ts

@@ -141,6 +141,9 @@ export interface IPathData {
 	// file exists, if false it does not. with
 	// undefined the state is unknown.
 	exists?: boolean;
+
+	// Specifies if the file should be only be opened if it exists
+	openOnlyIfExists?: boolean;
 }
 
 export interface IOpenFileRequest {