Added correct definition for createIndex method of IDBObjectStore interface

Author: aksharpatel47

baselines/dom.generated.d.ts

@@ -6988,7 +6988,7 @@ interface IDBObjectStore {
     add(value: any, key?: any): IDBRequest;
     clear(): IDBRequest;
     count(key?: any): IDBRequest;
-    createIndex(name: string, keyPath: string, optionalParameters?: any): IDBIndex;
+    createIndex(name: string, keyPath: string | string[], optionalParameters?: any): IDBIndex;
     delete(key: any): IDBRequest;
     deleteIndex(indexName: string): void;
     get(key: any): IDBRequest;

baselines/webworker.generated.d.ts

@@ -376,7 +376,7 @@ interface IDBObjectStore {
     add(value: any, key?: any): IDBRequest;
     clear(): IDBRequest;
     count(key?: any): IDBRequest;
-    createIndex(name: string, keyPath: string, optionalParameters?: any): IDBIndex;
+    createIndex(name: string, keyPath: string | string[], optionalParameters?: any): IDBIndex;
     delete(key: any): IDBRequest;
     deleteIndex(indexName: string): void;
     get(key: any): IDBRequest;

inputfiles/overridingTypes.json

@@ -1,4 +1,10 @@
  [
+     {
+         "kind": "method",
+         "interface": "IDBObjectStore",
+         "name": "createIndex",
+         "signatures": ["createIndex(name: string, keyPath: string | string[], optionalParameters?: any): IDBIndex"]
+     },
     {
         "kind": "method",
         "interface": "WebGLRenderingContext",