Refactor cache_temperature to pass around tab instead of browser.
Refactor cache_temperature to pass around tab instead of browser.

BUG=chromium:786988

Change-Id: If37d0dcf7353b866aee688fa3629a14b71411c0f
Reviewed-on: https://chromium-review.googlesource.com/785352
Reviewed-by: Ned Nguyen <8e49e083cfcfb68517585b2e78d68c2fd2b70562@google.com>
Commit-Queue: Ross McIlroy <daf13860444c579bf157bc86e8c4bb7f7417921f@chromium.org>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult