Make [S,G]getBacklightsForcedOff dbus API integrated to power_manager_client

chromeos/dbus/fake_power_manager_client.cc

Index: chromeos/dbus/fake_power_manager_client.cc
diff --git a/chromeos/dbus/fake_power_manager_client.cc b/chromeos/dbus/fake_power_manager_client.cc
index dcb82fac20dd48af9a34d86a0bdd10d2a857279a..1bcbee103154978777c3b24d501929e5a7862860 100644
--- a/chromeos/dbus/fake_power_manager_client.cc
+++ b/chromeos/dbus/fake_power_manager_client.cc
@@ -24,6 +24,7 @@ FakePowerManagerClient::FakePowerManagerClient()
       num_set_is_projecting_calls_(0),
       num_pending_suspend_readiness_callbacks_(0),
       is_projecting_(false),
+      backlights_forced_off_(false),
       weak_ptr_factory_(this) {
 }
 
@@ -134,6 +135,16 @@ void FakePowerManagerClient::SetPowerSource(const std::string& id) {
   NotifyObservers();
 }
 
+void FakePowerManagerClient::SetBacklightsForcedOff(bool forced_off) {
+  backlights_forced_off_ = forced_off;
+}
+
+void FakePowerManagerClient::GetBacklightsForcedOff(
+    const GetBacklightsForcedOffCallback& callback) {
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE, base::Bind(callback, backlights_forced_off_));
+}
+
 base::Closure FakePowerManagerClient::GetSuspendReadinessCallback() {
   ++num_pending_suspend_readiness_callbacks_;