GitLab

Fix a crash when GetFrameNodeForRenderFrameHost is called before the
RenderFrameCreate notification.

R=fdoray

Bug: 1134162
Change-Id: Ia51f7031680554e888479ed4f7f4507be92f47cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2443110
Commit-Queue: Chris Hamilton <chrisha@chromium.org>
Reviewed-by: Chris Hamilton <chrisha@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813020}