Remove code for pregenerated profile handling from SharedPageState
Remove code for pregenerated profile handling from SharedPageState

The CL in https://codereview.chromium.org/1884493002/ creates a new
child class with logic to handle pregenerated profile. This CL removes this logic
from SharedPageState.

Review URL: https://codereview.chromium.org/1871033002

sahiljain/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,catapult-project/catapult,benschmaus/catapult,benschmaus/catapult,sahiljain/catapult,sahiljain/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,benschmaus/catapult,sahiljain/catapult,benschmaus/catapult,catapult-project/catapult-csm,catapult-project/catapult,benschmaus/catapult,catapult-project/catapult-csm,catapult-project/catapult,benschmaus/catapult,sahiljain/catapult,catapult-project/catapult-csm,catapult-project/catapult,sahiljain/catapult,catapult-project/catapult,catapult-project/catapult,benschmaus/catapult,catapult-project/catapult