GitLab

We thought embedding_render_widget_ would outlive the BrowserPlugin, but
apparently not, so use weak pointers to ensure we don't access
embedding_render_widget_ once it's gone.

Bug: 812966
Change-Id: I7f374a63bd34db3cb616fa961d7c504570c5ef2d
Reviewed-on: https://chromium-review.googlesource.com/959239Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Saman Sami <samans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#542890}