Add GetUsageAndQuota() to Syncable API

chrome/test/data/extensions/api_test/sync_file_system/get_usage_and_quota/test.js

Index: chrome/test/data/extensions/api_test/sync_file_system/get_usage_and_quota/test.js
diff --git a/chrome/test/data/extensions/api_test/sync_file_system/get_usage_and_quota/test.js b/chrome/test/data/extensions/api_test/sync_file_system/get_usage_and_quota/test.js
new file mode 100644
index 0000000000000000000000000000000000000000..4e164d4b18c06b84b8e74ba92189aa7ef23e455f
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/sync_file_system/get_usage_and_quota/test.js
@@ -0,0 +1,16 @@
+// Copyright (c) 2012 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.
+
+// TODO(calvinlo): Update test code after default quota is made const
+// (http://crbug.com/155488).
+chrome.test.runTests([
+  function getUsageAndQuota() {
+    chrome.syncFileSystem.getUsageAndQuota(
+        'drive',
+        chrome.test.callbackPass(function(info) {
+            chrome.test.assertEq(0, info.usage);
+            chrome.test.assertEq(123456789, info.quota);
+        }));
+  }
+]);