Avoid dialogs and generating call stacks under a debugger
Avoid dialogs and generating call stacks under a debugger

If a process is being debugged when it hits a LOG_FATAL message then do
as little as possible before breaking in to the debugger.

R=thestig@chromium.org
BUG=528457

Review URL: https://codereview.chromium.org/1310083004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#347545}

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