With this commit, write barrier is switched to use CodeStubAssembler.

Bug: chromium:749486
Change-Id: I7e0914bee971e4f3a3257740ae7c83b31f791bd9
Reviewed-on: https://chromium-review.googlesource.com/598088Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Albert Mingkun Yang <albertnetymk@google.com>
Cr-Commit-Position: refs/heads/master@{#48006}