cc: avoid redundant error report on android.

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 589b80e171c3162bd165f866d10f0a269f18a62c..f1ef243b83c595dcbfda11fe6afb26488f1a3c20 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -2256,7 +2256,7 @@ void LayerTreeHostImpl::CreateResourceAndRasterBufferProvider(
   bool use_zero_copy = settings_.use_zero_copy;
   // TODO(reveman): Remove this when mojo supports worker contexts.
   // crbug.com/522440
-  if (!worker_context_provider) {
+  if (!use_zero_copy && !worker_context_provider) {
     LOG(ERROR)
         << "Forcing zero-copy tile initialization as worker context is missing";
     use_zero_copy = true;