Chrome Version: Built from head (54b502116ca85d9060a362033bf6c29b896c4a06)
OS: Linux

What steps will reproduce the problem?

(1) Build in debug mode. I'm not sure if args.gn is important, but here's mine:

	import("//build/args/headless.gn")
	is_debug = true
	symbol_level = 1
	is_component_build = true
	target_cpu = "x64"

(2) Run `headless_example http://www.google.com/` (Any url seems to work?)
(3) Observe that it crashes with the following message:

  headless_devtools_client_impl.cc(278)]
  Check failed: false. Unknown event: Inspector.targetReloadedAfterCrash


What is the expected result? No crash in debug mode.
What happens instead? Crash.