Use in-class initializers for base::WeakPtrFactory (remaining uses on Chrome OS).

Changed NULL to nullptr where the presubmit complained (due to new line wrapping).

Generated by: https://chromium-review.googlesource.com/c/chromium/src/+/1689216

Bug: 981415
Tbr: gab@chromium.org
Change-Id: I9c7ea90816e2a2418981108f657bc52cee8c06ef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1703541
Commit-Queue: Jeremy Roman <jbroman@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Reviewed-by: James Cook <jamescook@chromium.org>
Reviewed-by: Gabriel Charette <gab@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#688514}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 47d432e71ef8ddf621b69f0fc6e6362bf1be6278
2 files changed