GitLab

Make PowerManagerClient iterate over a map of (signal name,
function pointer) tuples instead of repeating a bunch of
difficult-to-read ConnectToSignal calls.

Also switch to in-class initialization of data members.

Bug: none
Change-Id: Ifff2a30481556c5ff86f83f4ca721b00504d7856
Reviewed-on: https://chromium-review.googlesource.com/981525Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Dan Erat <derat@chromium.org>
Cr-Commit-Position: refs/heads/master@{#546201}