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From crashes (https://crbug.com/1146573#c38) we can see that
render_frame_created_ is not staying false in RenderProcessExited.
This introduces debugging to catch a second call to
SetRenderFrameCreated(true) if it occurs during the section of code
under suspicion.

Bug: 1146573
Change-Id: I32b9a3202080690dc1f7227c8b62e3852f7e8cf4
Cq-Do-Not-Cancel-Tryjobs: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2583584
Commit-Queue: Fergal Daly <fergal@chromium.org>
Auto-Submit: Fergal Daly <fergal@chromium.org>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836119}