Force rewrite base::FileDescriptorWatcher::Controller::watcher_ in rewrite_raw_ptr_fields

base::FileDescriptorWatcher::Controller::watcher_ wasn't being rewritten because Controller is used in WeakPtr and WeakPtr does a reinterpret_cast.
base::FileDescriptorWatcher::Controller::watcher_ is important to rewrite because otherwise it would cause a dangling pointer to be assigned to CheckedPtr.

Bug: 1179103
Change-Id: Ifa1a0e3c638a3ac03e50c6f4f3f7fbb2d85e7933
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2698912
Reviewed-by: Bartek Nowierski <bartekn@chromium.org>
Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
Commit-Queue: Łukasz Anforowicz <lukasza@chromium.org>
Auto-Submit: Keishi Hattori <keishi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#854842}
GitOrigin-RevId: b6beb669d5b1888a1d32166c765c354ad1a42164
1 file changed