Revert "system_api: Remove presentation_idle_delay_factor."

This reverts commit 07f96f16, which removed a field that
Chrome was still setting.

BUG=chromium:248276
TEST=none

Change-Id: I128d3f48904fdd3b41f6cdd7cbb73408656febb0
Reviewed-on: https://gerrit.chromium.org/gerrit/59453
Commit-Queue: Daniel Erat <derat@chromium.org>
Tested-by: Daniel Erat <derat@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
1 file changed
tree: 065f19e792b44246b08c76d3ebc02e1ec8ceff2c
  1. dbus/
  2. switches/
  3. README
  4. system_api.gyp