Deprecate the webkit-prefixed standard IndexedDB entry points

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

 if (this.importScripts) {
     importScripts('../../../resources/js-test.js');
     importScripts('shared.js');
 }
 
-description("Test IndexedDB's webkitIDBObjectStore.clear().");
+description("Test IndexedDB's IDBObjectStore.clear().");
 
 indexedDBTest(prepareDatabase, setVersionComplete);
 function prepareDatabase()
 {
     db = event.target.result;
     event.target.transaction.onabort = unexpectedAbortCallback;
 
     store = evalAndLog("store = db.createObjectStore('storeName', null)");
 
     self.index = evalAndLog("store.createIndex('indexName', '')");
@@ skipping 55 matching lines @@
     request.onsuccess = getSuccess;
     request.onerror = unexpectedErrorCallback;
 }
 
 function getSuccess()
 {
     shouldBeEqualToString("event.target.result", "value");
 
     finishJSTest();
 }