This framebuffer changing timing code adds overhead so it should stay
disabled unless turned on explicitly.
This was causing a performance regression in the native benchmark for
some trace tests like egypt.
Bug: angleproject:4845
Change-Id: I51c77d544cae063ba185aa4f20d028d9ffa7a2ab
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2335021Reviewed-by: Cody Northrop <cnorthrop@google.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
