Bug 974319 - MockDOMRequest and tests
Bug 974319 - Part II - Fix MockDeviceStorage and Screenshot tests
typo mock_navigator_get_device_storage
Bug 974319 - Part III - Fix storage_watcher_test.js
Bug 974319 - Part IV - Include MockDOMRequest in bluetooth_transfer_test.js
Merge pull request #17507 from timdream/mock-dom-request

Bug 974319 - MockDOMRequest and fix deviceStorage tests with setTimeout(), r=alive