Move another set of extension tests to manifest_version 2

chrome/test/data/extensions/api_test/storage/background.html

-<script>
-  // store some stuff in local storage
-  localStorage.foo = "bar";
-
-  console.log("Opening database...");
-  // store some stuff in a database
-  var db = window.openDatabase("mydb2", "1.0", "database test", 2048);
-  if (!db)
-    chrome.test.notifyFail("failed to open database");
-
-  console.log("Performing transaction...");
-  db.transaction(function(tx) {
-    tx.executeSql("drop table if exists note", [], onDropSuccess, onSqlError);
-    tx.executeSql("create table note (body text)", [], onCreateSuccess, onSqlError);
-    tx.executeSql("insert into note values ('hotdog')", [], onSqlExecuted,
-                  onSqlError);
-  }, function(error) {
-    chrome.test.notifyFail(error.message);
-  });
-
-  function onDropSuccess(tx, res) {
-    console.log("note table dropped");
-  }
-  function onCreateSuccess(tx, res) {
-    console.log("note table created");
-  }
-  function onSqlError(tx, error) {
-    chrome.test.notifyFail(error.message);
-  }
-  function onSqlExecuted() {
-    console.log("Opening tab...");
-    // Open a tab. This doesn't really prove we're writing to disk, but it is
-    // difficult to prove that without shutting down the process. We'll just
-    // trust that if this next trick works, that the real testing for local
-    // storage is good enough to catch more subtle errors.
-    chrome.tabs.create({
-      url: "tab.html"
-    });
-  }
-</script>
+<!--
+ * Copyright (c) 2011 The Chromium Authors. All rights reserved.  Use of this
+ * source code is governed by a BSD-style license that can be found in the
+ * LICENSE file.
+-->
+<script src="background.js"></script>