Fix for cdb tests

Fix for cdb tests

There's a problem running crashpad_handler, but I'm not sure what it is.
I think an exception is getting swallowed because my handling of
`handler` was incorrect, so correctly initialize that to see the
exception.

https://build.chromium.org/p/client.crashpad/builders/crashpad_win_x64_rel/builds/36/steps/run%20tests/logs/stdio
"""
UnboundLocalError: local variable 'handler' referenced before assignment
"""

(I also realized the !locks code hasn't landed yet so disable those tests
for now too.)

R=mark@chromium.org
BUG=crashpad:46
Committed: https://chromium.googlesource.com/crashpad/crashpad/+/52238122e99c23af3ee7fc3186ca0dd0e79a4532

[Mark Mentovai, 2015-10-09 20:57:08]

LGTM

[scottmg, 2015-10-09 20:59:39]

Committed patchset #1 (id:1) manually as
52238122e99c23af3ee7fc3186ca0dd0e79a4532 (presubmit successful).