Remove scroll_clip_layer dependency from viewport layer tracking

cc/layers/layer_impl_unittest.cc

Index: cc/layers/layer_impl_unittest.cc
diff --git a/cc/layers/layer_impl_unittest.cc b/cc/layers/layer_impl_unittest.cc
index 6981516bed52fcac3f04fec684a2aa5a3ac94262..8311773a4b556f005e74a8e5f5de8892ef5c02a5 100644
--- a/cc/layers/layer_impl_unittest.cc
+++ b/cc/layers/layer_impl_unittest.cc
@@ -141,7 +141,8 @@ TEST(LayerImplTest, VerifyLayerChangesAreTrackedProperly) {
   // Make root the inner viewport scroll layer. This ensures the later call to
   // |SetViewportBoundsDelta| will be on a viewport layer.
   host_impl.active_tree()->SetViewportLayersFromIds(
-      Layer::INVALID_ID, Layer::INVALID_ID, root->id(), Layer::INVALID_ID);
+      Layer::INVALID_ID, Layer::INVALID_ID, Layer::INVALID_ID,
+      Layer::INVALID_ID, root->id(), Layer::INVALID_ID);
 
   root->test_properties()->force_render_surface = true;
   root->SetMasksToBounds(true);