libbrillo: Update libchrome APIs to r395517

The new libchrome has been ported from Chromium and some APIs have
changed. Make necessary changes at call sites.

BUG: 28985443
TEST: All tests in libbrillo_test pass on dragonboard-eng build
CQ-DEPEND=CL:346457

Change-Id: Ie9343893a77b3638e03e89e3090ef61868d43c3b
(cherry picked from commit 4ec4c4d2e4f8ac46ea8e767c1ed88242811a8f4d)
Reviewed-on: https://chromium-review.googlesource.com/349110
Commit-Ready: Heng-ruey Hsu <[email protected]>
Tested-by: Heng-ruey Hsu <[email protected]>
Reviewed-by: Luis Hector Chavez <[email protected]>

• brillo/asynchronous_signal_handler.h[diff]
• brillo/bind_lambda.h[diff]
• brillo/dbus/utils.cc[diff]
• brillo/glib/object.h[diff]
• brillo/glib/object_unittest.cc[diff]
• brillo/process.cc[diff]
• libbrillo-395517.gypi[Renamed from libbrillo-381699.gypi - diff]
• libbrillo.gyp[diff]
• policy/libpolicy.h[diff]