GitLab

This is a regression from https://codereview.chromium.org/1530523002.
We should be passing signal_strategy_.get() instead of signal_strategy.get()
to the underlying JingleSessionManager in
it2me_host.cc

BUG=579758

Review URL: https://codereview.chromium.org/1638733002

Cr-Commit-Position: refs/heads/master@{#371452}