Bug 1062377 - Try loading profile.ini in background; r=mfinkle r=rnewman
We can move our profile accessing code to later in the startup process. The benefit of that is in early startup, we can prefetch the profile.ini file in the background and not block the UI thread
Bug 1062377 - Rewrite GeckoBackgroundThread to not wait for thread start if possible; r=rnewman
When GeckoBackgroundThread is first used, it starts a new thread and waits for a Handler. This can delay startup. Instead, we can just save the Runnable and run it when the thread is starting.
Bug 1062377 - Add JUnit test for new GeckoBackgroundThread; r=rnewman
Bug 1062377 - Lock profile and use separate LocalBrowserDB instance for initializing new profile; r=rnewman