GitLab

A FrameTreeNode may be deleted during navigations (e.g. by an unload
handler), NavigateFrameToURL needs to check for this before using the
FrameTreeNode object.

Fixed: 1149380
Change-Id: I0bc361f7cee17fda0cbef7ec8d2b40a777f3018f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2543533
Auto-Submit: Fergal Daly <fergal@chromium.org>
Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Commit-Queue: Fergal Daly <fergal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828617}