Try to diagnose blink reinitialisation in WebView.
WebView somehow ends up shutting down and reinitialising blink in the
same process sometimes, which isn't supported. We have no idea how to
reproduce this, so this change adds assertions that verify that we never
shut down InProcessRendererThread unless the browser is already being
shut down. WebView only exits by the process being SIGKILLed, so the
shutdown path is intended to be unreachable.
This is a temporary change that will be reverted once we've found the
stack that leads to the shutdown being initiated.
BUG=514141
Review-Url: https://codereview.chromium.org/1900513003
Cr-Commit-Position: refs/heads/master@{#391207}
2 files changed
