Linux native notifications: Add server capabilities metrics
This CL adds the following metrics:
* If the system has a dbus object at /org/Freedesktop/Notifications
with interface org.Freedesktop.Notifications
* Server capabilities as returned by GetCapabilities
* Capabilities are stored in |capabilities_|. It is not used now,
but will be in the future.
* Whether native notifications are actually used
BUG=676220
R=peter@chromium.org,mpearson@chromium.org
CC=thestig@chromium.org
Review-Url: https://codereview.chromium.org/2856753002
Cr-Commit-Position: refs/heads/master@{#469434}
5 files changed