SurfaceAggregator should check whether output is secure when drawin

cc/trees/layer_tree_host.cc

Index: cc/trees/layer_tree_host.cc
diff --git a/cc/trees/layer_tree_host.cc b/cc/trees/layer_tree_host.cc
index d50c3a84faac2b98b081304b5548af4e37b3f814..d3fbab64d5b9dffc577dc129a3908c149d4c7978 100644
--- a/cc/trees/layer_tree_host.cc
+++ b/cc/trees/layer_tree_host.cc
@@ -650,10 +650,6 @@ void LayerTreeHost::SetNeedsDisplayOnAllLayers() {
     layer->SetNeedsDisplay();
 }
 
-void LayerTreeHost::SetOutputIsSecure(bool output_is_secure) {
-  proxy_->SetOutputIsSecure(output_is_secure);
-}
-
 const RendererCapabilities& LayerTreeHost::GetRendererCapabilities() const {
   return proxy_->GetRendererCapabilities();
 }