Add timing stats for Renderer11::initializeDevice. This gives us insight to what we can optimize away. BUG=angleproject:1014 Change-Id: I86208c5cbebe14905a05d0859b9e37368f4c25d4 Reviewed-on: https://chromium-review.googlesource.com/273862 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>