Remove PrioritizeArcInstance() from SessionManagerClient

chromeos/dbus/fake_session_manager_client.cc

Index: chromeos/dbus/fake_session_manager_client.cc
diff --git a/chromeos/dbus/fake_session_manager_client.cc b/chromeos/dbus/fake_session_manager_client.cc
index ba25113e3fd04f03628e9417afa36c223eb4cfce..88726fd1e1c4f334e2c884565b14c881e6e53989 100644
--- a/chromeos/dbus/fake_session_manager_client.cc
+++ b/chromeos/dbus/fake_session_manager_client.cc
@@ -178,12 +178,6 @@ void FakeSessionManagerClient::StopArcInstance(const ArcCallback& callback) {
       FROM_HERE, base::Bind(callback, arc_available_));
 }
 
-void FakeSessionManagerClient::PrioritizeArcInstance(
-    const ArcCallback& callback) {
-  base::ThreadTaskRunnerHandle::Get()->PostTask(
-      FROM_HERE, base::Bind(callback, arc_available_));
-}
-
 void FakeSessionManagerClient::SetArcCpuRestriction(
     login_manager::ContainerCpuRestrictionState restriction_state,
     const ArcCallback& callback) {