Make operators on scoped_ptr match the ones defined for std::unique_ptr

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 6834c2200d58a17998221f7424d3a56a137db68c..fcc98b5417f983d7d1f60163118ea6fdfec8634e 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -899,7 +899,7 @@ DrawResult LayerTreeHostImpl::CalculateRenderPasses(
           it->draw_properties().occlusion_in_content_space.IsOccluded(
               it->visible_layer_rect());
       if (!occluded && it->WillDraw(draw_mode, resource_provider_.get())) {
-        DCHECK_EQ(active_tree_, it->layer_tree_impl());
+        DCHECK_EQ(active_tree_.get(), it->layer_tree_impl());
 
         frame->will_draw_layers.push_back(*it);