cc: Turn impl_side_painting and use_one_copy on in LayerTreeSettings.

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 2ef7beffc28f9dd92d2fbe2ab3aad3c784521a53..38fb44439bd34a03a91e07787d780f91fafeae1c 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -233,6 +233,7 @@ LayerTreeHostImpl::LayerTreeHostImpl(
       is_likely_to_require_a_draw_(false),
       frame_timing_tracker_(FrameTimingTracker::Create(this)) {
   DCHECK(proxy_->IsImplThread());
+  DCHECK_IMPLIES(settings.impl_side_painting, task_graph_runner_);

[enne (OOO), 2015/06/15 22:58:46]

Do we have a one copy implies not zero copy and zero copy implies not one copy
dcheck anywhere too?

[danakj, 2015/06/15 23:02:35]

We do in RenderProcessHostImpl not in cc. I can add.

   DidVisibilityChange(this, visible_);
   animation_registrar_->set_supports_scroll_animations(
       proxy_->SupportsImplScrolling());