system_api: Add powerd inactivity delays signal and method.

Add a constant for a new InactivityDelaysChanged D-Bus
signal containing a serialized PowerManagementPolicy::Delays
protocol buffer that powerd will emit when its delays
change.

Also add a GetInactivityDelays method that can be called to
get the current delays (again, as a Delays protobuf).

BUG=chromium:801177
TEST=emerged system-api

Change-Id: I5f39d47f42b504c5c18238182a093f0abf072d98
Reviewed-on: https://chromium-review.googlesource.com/862985
Commit-Ready: Dan Erat <derat@chromium.org>
Tested-by: Dan Erat <derat@chromium.org>
Reviewed-by: Eric Caruso <ejcaruso@chromium.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/dbus/power_manager/dbus-constants.h b/dbus/power_manager/dbus-constants.h
index 30bc8bc..dedb093 100644
--- a/dbus/power_manager/dbus-constants.h
+++ b/dbus/power_manager/dbus-constants.h
@@ -39,6 +39,7 @@ const char kHandlePowerButtonAcknowledgmentMethod[] =
     "HandlePowerButtonAcknowledgment";
 const char kIgnoreNextPowerButtonPressMethod[] = "IgnoreNextPowerButtonPress";
 const char kRecordDarkResumeWakeReasonMethod[] = "RecordDarkResumeWakeReason";
+const char kGetInactivityDelaysMethod[] = "GetInactivityDelays";
 // Signals emitted by powerd.
 const char kBrightnessChangedSignal[] = "BrightnessChanged";
 const char kKeyboardBrightnessChangedSignal[] = "KeyboardBrightnessChanged";
@@ -51,6 +52,7 @@ const char kInputEventSignal[] = "InputEvent";
 const char kIdleActionImminentSignal[] = "IdleActionImminent";
 const char kIdleActionDeferredSignal[] = "IdleActionDeferred";
 const char kScreenIdleStateChangedSignal[] = "ScreenIdleStateChanged";
+const char kInactivityDelaysChangedSignal[] = "InactivityDelaysChanged";
 // Values
 const int kBrightnessTransitionGradual = 1;
 const int kBrightnessTransitionInstant = 2;