Deprecate the webkit-prefixed standard IndexedDB entry points

LayoutTests/storage/indexeddb/resources/objectstore-removeobjectstore.js

 if (this.importScripts) {
     importScripts('../../../resources/js-test.js');
     importScripts('shared.js');
 }
 
-description("Test IndexedDB's webkitIDBObjectStore.deleteObjectStore().");
+description("Test IndexedDB's IDBObjectStore.deleteObjectStore().");
 
 indexedDBTest(prepareDatabase, getValue);
 function prepareDatabase()
 {
     db = event.target.result;
     event.target.transaction.onabort = unexpectedAbortCallback;
     store = evalAndLog("store = db.createObjectStore('storeName', null)");
 
     self.index = evalAndLog("store.createIndex('indexName', '')");
     shouldBeTrue("store.indexNames.contains('indexName')");
@@ skipping 56 matching lines @@
     request.onerror = unexpectedErrorCallback;
 }
 
 function verifyNotFound()
 {
     shouldBe("event.target.result", "undefined");
     shouldBeFalse("event.target.source.indexNames.contains('indexName')");
 
     finishJSTest();
 }