Remove worker support of Web SQL Database.

LayoutTests/fast/workers/storage/resources/change-version-sync-1.js

-var EXPECTED_VERSION_AFTER_HIXIE_TEST = "2";
-var EXPECTED_VERSION_AFTER_RELOAD = "3";
-
-var db1 = openDatabaseSync("ChangeVersionTest", "1", "Test for the database.changeVersion() function", 1);
-var db2 = openDatabaseSync("ChangeVersionTest", "1", "Test for the database.changeVersion() function", 1);
-
-// First run Hixie's test to ensure basic changeVersion() functionality works (see bug 28418).
-db1.changeVersion("1", EXPECTED_VERSION_AFTER_HIXIE_TEST);
-if (db2.version != db1.version) {
-    postMessage("FAIL: changing db1's version (" + db1.version + ") did not change db2's version (" + db2.version + ") as expected.");
-    postMessage("fail");
-} else
-    postMessage("PASS: changing db1's version (" + db1.version + ") changed db2's version too.");
-
-db2.transaction(function(tx) {
-    try {
-        tx.executeSql("CREATE TABLE IF NOT EXISTS Test (Foo INT)");
-        postMessage("FAIL: The DB version changed, executing any statement on db2 should fail.");
-        postMessage("fail");
-    } catch(err) {
-      postMessage("PASS: Executing a statement on db2 threw an exception as expected.");
-    }
-});
-
-// Make sure any new handle to the same DB sees the new version
-try {
-    var db3 = openDatabaseSync("ChangeVersionTest", EXPECTED_VERSION_AFTER_HIXIE_TEST, "", 1);
-    postMessage("PASS: Successfully opened a new DB handle.");
-} catch (err) {
-    postMessage("FAIL: Unexpected exception thrown while trying to open a new DB handle: " + err);
-    postMessage("fail");
-}
-
-if (db1.version != db3.version) {
-    postMessage("FAIL: db1.version (" + db1.version + ") does not match db3.version(" + db3.version +")");
-    postMessage("fail");
-} else
-    postMessage("PASS: db1.version (" + db1.version + ") matches db3.version.");
-
-// Now try a test to ensure the version persists after reloading (see bug 27836)
-db1.changeVersion(EXPECTED_VERSION_AFTER_HIXIE_TEST, EXPECTED_VERSION_AFTER_RELOAD,
-                  function(tx) {
-                      tx.executeSql("DROP TABLE IF EXISTS Info");
-                      tx.executeSql("CREATE TABLE IF NOT EXISTS Info (Version INTEGER)");
-                      tx.executeSql("INSERT INTO Info VALUES (?)", [EXPECTED_VERSION_AFTER_RELOAD]);
-                  });
-
-postMessage("done");