Replace unique_ptr.reset(other_unique_ptr.release()) with std::move() in cc/trees/

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index d271d40b131de04e2908229200b696e8ad110d9c..884ff43187b8790153143f5ce4a209c5648f0e39 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -2117,7 +2117,7 @@ TEST_F(LayerTreeHostImplTest, ScrollDoesntBubble) {
   std::unique_ptr<std::set<LayerImpl*>> scroll_children(
       new std::set<LayerImpl*>);
   scroll_children->insert(child_clip);
-  parent->test_properties()->scroll_children.reset(scroll_children.release());
+  parent->test_properties()->scroll_children = std::move(scroll_children);
   host_impl_->active_tree()->BuildPropertyTreesForTesting();
 
   DrawFrame();