Change the signature of `Construct` so that no casting is required on
calling it. The casting would fire control flow integrity check if the
class contains virtual members.

Bug: chromium:758925
Change-Id: Iefc711c634b36efd051e245e2df13b28d5563f45
Reviewed-on: https://chromium-review.googlesource.com/635563Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Albert Mingkun Yang <albertnetymk@google.com>
Cr-Commit-Position: refs/heads/master@{#47608}