Move another set of extension tests to manifest_version 2

chrome/test/data/extensions/api_test/storage/tab.js

+chrome.test.runTests([function tab() {
+  // Check that the localstorage stuff we stored is still there.
+  chrome.test.assertTrue(localStorage.foo == "bar");
+
+  // Check that the database stuff we stored is still there.
+  try {
+    console.log("Opening database...");
+    var db = window.openDatabase("mydb2", "1.0", "database test", 2048);
+    console.log("DONE opening database");
+  } catch (err) {
+    console.log("Exception");
+    console.log(err.message);
+  }
+  if (!db)
+    chrome.test.fail("failed to open database");
+
+  console.log("Performing transaction...");
+  db.transaction(function(tx) {
+    tx.executeSql("select body from note", [], function(tx, results) {
+      chrome.test.assertTrue(results.rows.length == 1);
+      chrome.test.assertTrue(results.rows.item(0).body == "hotdog");
+      chrome.test.succeed();
+    }, function(tx, error) {
+      chrome.test.fail(error.message);
+    });
+  }, function(error) {
+    chrome.test.fail(error.message);
+  });
+}]);