Deprecate the webkit-prefixed standard IndexedDB entry points

LayoutTests/storage/indexeddb/resources/shared.js

 var jsTestIsAsync = true;
 if (self.importScripts && !self.postMessage) {
     // Shared worker.  Make postMessage send to the newest client, which in
     // our tests is the only client.
 
     // Store messages for sending until we have somewhere to send them.
     self.postMessage = function(message)
     {
         if (typeof self.pendingMessages === "undefined")
             self.pendingMessages = [];
         self.pendingMessages.push(message);
     };
     self.onconnect = function(event)
     {
         self.postMessage = function(message)
         {
             event.ports[0].postMessage(message);
         };
         // Offload any stored messages now that someone has connected to us.
         if (typeof self.pendingMessages === "undefined")
             return;
         while (self.pendingMessages.length)
             event.ports[0].postMessage(self.pendingMessages.shift());
     };
 }
 
 function removeVendorPrefixes()
 {
-    IDBCursor = self.IDBCursor || self.webkitIDBCursor;
-    IDBDatabase = self.IDBDatabase || self.webkitIDBDatabase;
-    IDBFactory = self.IDBFactory || self.webkitIDBFactory;
-    IDBIndex = self.IDBIndex || self.webkitIDBIndex;
-    IDBKeyRange = self.IDBKeyRange || self.webkitIDBKeyRange;
-    IDBObjectStore = self.IDBObjectStore || self.webkitIDBObjectStore;
-    IDBRequest = self.IDBRequest || self.webkitIDBRequest;
-    IDBTransaction = self.IDBTransaction || self.webkitIDBTransaction;
-
     indexedDB = evalAndLog("indexedDB = self.indexedDB || self.webkitIndexedDB || self.mozIndexedDB || self.msIndexedDB || self.OIndexedDB;");
     debug("");
 }
 
 function unexpectedSuccessCallback()
 {
     testFailed("Success function called unexpectedly.");
     finishJSTest();
 }
 
@@ skipping 169 matching lines @@
 
     requests.forEach(function(req) {
         req.onsuccess = function() {
             --count;
             if (!count)
                 callback(requests);
         };
         req.onerror = unexpectedErrorCallback;
     });
 }