cc: Don't try set renderpasses on active tree after losing context.

cc/layers/delegated_renderer_layer_impl.cc

Index: cc/layers/delegated_renderer_layer_impl.cc
diff --git a/cc/layers/delegated_renderer_layer_impl.cc b/cc/layers/delegated_renderer_layer_impl.cc
index 63039fb1cdca3cb809f5c7bc419c1cfb321cdd6b..a99cd17b2c7bf74dd02d4bdda95d07b84e1aa3c9 100644
--- a/cc/layers/delegated_renderer_layer_impl.cc
+++ b/cc/layers/delegated_renderer_layer_impl.cc
@@ -78,6 +78,7 @@ void DelegatedRendererLayerImpl::PushPropertiesTo(LayerImpl* layer) {
   own_child_id_ = false;
 
   if (have_render_passes_to_push_) {
+    DCHECK(child_id_);
     // This passes ownership of the render passes to the active tree.
     delegated_layer->SetRenderPasses(&render_passes_in_draw_order_);
     // Once resources are on the active tree, give them to the ResourceProvider
@@ -216,6 +217,7 @@ scoped_ptr<LayerImpl> DelegatedRendererLayerImpl::CreateLayerImpl(
 void DelegatedRendererLayerImpl::ReleaseResources() {
   ClearRenderPasses();
   ClearChildId();
+  have_render_passes_to_push_ = false;
 }
 
 static inline int IndexToId(int index) { return index + 1; }