Made cache.Controller to be interface.

pkg/controller/podgc/gc_controller.go

@@ -50,7 +50,7 @@ type PodGCController struct {
 	internalPodInformer cache.SharedIndexInformer
 
 	podStore      cache.StoreToPodLister
-	podController cache.ControllerInterface
+	podController cache.Controller
 
 	deletePod              func(namespace, name string) error
 	terminatedPodThreshold int

pkg/controller/podgc/gc_controller_test.go

@@ -37,6 +37,10 @@ func (*FakeController) HasSynced() bool {
 	return true
 }
 
+func (*FakeController) LastSyncResourceVersion() string {
+	return ""
+}
+
 func TestGCTerminated(t *testing.T) {
 	type nameToPhase struct {
 		name  string