[autotest] Grab more chrome logs, not just the last one, to hedge against crashes
There are still some "Timed out waiting for login" failures on the
BVT, always in desktopui_ChromeFirstRender for some reason. These
failures also seem to have empty chrome logs for some frustrating reason.
This change clears out old chrome logs when we restart the browser before login
and then just grabs ALL the prelogin chrome logs at the end of the test.
BUG=None
TEST=BVT
Change-Id: Icc0122d8dd7e5abd505e4affdc3e50bfaaeb4575
Review URL: http://codereview.chromium.org/3338019
2 files changed