bug 980468: Ensure that content script syntax errors can be caught.
Bug 991692 - "TypeError: internals.tracker is undefined" found in green jetpack test runs
Binding console methods time and timeEnd in a followup to Bug 641463.

Add support to sdk test loader.
Binding console methods time and timeEnd in a followup to Bug 641463.

Fix tests, adhere to 80 characters per line limit.