Replace the hard-coded object path "/" with kFlimflamServicePath.

Along the way, replaced kConnman* constants with kFlimflam* in
chromeos_network_deprecated.cc.

BUG=chromium-os:20135
TEST=gmerge system_api, libcros, chrome, and networking works

Change-Id: Ibf9792922f86278223755a3a86987d2178a0a264
Reviewed-on: http://gerrit.chromium.org/gerrit/7374
Tested-by: Satoru Takabayashi <satorux@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
2 files changed