GitLab

PAGE_DONE is not useful on non-Windows platforms. Stop dispatching the
event in these cases.

Bug: None
Change-Id: I317b8d7ecd265c8386d474316685bcfb7113061c
Reviewed-on: https://chromium-review.googlesource.com/802822
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521053}