Remove worker support of Web SQL Database.

LayoutTests/fast/workers/storage/resources/open-database-creation-callback-sync.js

-var creationCallbackCalled1 = false;
-var db1Name = "OpenDatabaseCreationCallback1" + (new Date()).getTime();
-var db2Name = "OpenDatabaseCreationCallback2" + (new Date()).getTime();
-var db1 = openDatabaseSync(db1Name, "1.0", "", 1,
-                           function(db) {
-                               postMessage("PASS: Creation callback was called.");
-                               if (db.version != "")
-                                   postMessage("FAIL: Wrong version " + db.version + "; empty string expected.");
-                               else
-                                   postMessage("PASS: Version set to empty string as expected.");
-                           });
-
-var db1Fail = null;
-try {
-    db1Fail = openDatabaseSync(db1Name, "1.0", "", 1);
-    postMessage("FAIL: An INVALID_STATE_ERR exception should've been thrown.");
-} catch(err) {
-    if (db1Fail)
-        postMessage("FAIL: db1Fail should have been null.");
-    else
-        postMessage("PASS: An exception was thrown and db1Fail is null as expected.");
-}
-
-// Open a handle to another database, first without a creation callback, then with one.
-// Make sure the creation callback is not called.
-var db2 = openDatabaseSync(db2Name, "1.0", "", 1);
-db2 = openDatabaseSync(db2Name, "1.0", "", 1, function(db) { postMessage("FAIL: Creation callback should not have been called."); });
-
-postMessage("done");