Drop software resources sent to a GL delegated renderer.

cc/resources/resource_provider.cc

Index: cc/resources/resource_provider.cc
diff --git a/cc/resources/resource_provider.cc b/cc/resources/resource_provider.cc
index 55dafbd47d20e36196a8924b800c97cbbc9191db..44b2794e8c7fa9bf9a64c3e5a4325adde304d35e 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -1396,6 +1396,16 @@ void ResourceProvider::ReceiveFromChild(
       continue;
     }
 
+    if (it->is_software && gl) {
+      TRACE_EVENT0(
+          "cc",
+          "ResourceProvider::ReceiveFromChild dropping software resource");
+      ReturnedResourceArray to_return;
+      to_return.push_back(it->ToReturnedResource());
+      child_info.return_callback.Run(to_return);
+      continue;
+    }
+
     ResourceId local_id = next_id_++;
     Resource& resource = resources_[local_id];
     if (it->is_software) {