cc: Turn impl_side_painting and use_one_copy on in LayerTreeSettings.

cc/trees/layer_tree_host_unittest.cc

Index: cc/trees/layer_tree_host_unittest.cc
diff --git a/cc/trees/layer_tree_host_unittest.cc b/cc/trees/layer_tree_host_unittest.cc
index 79c5f53fb78808b0d062a3d50fe40b7712ead071..df35d345f683e186cff6bda94830d3b1d1fe1bff 100644
--- a/cc/trees/layer_tree_host_unittest.cc
+++ b/cc/trees/layer_tree_host_unittest.cc
@@ -1616,6 +1616,7 @@ class LayerTreeHostTestCompositeImmediatelyStateTransitions
   void InitializeSettings(LayerTreeSettings* settings) override {
     settings->single_thread_proxy_scheduler = false;
     settings->use_zero_copy = true;
+    settings->use_one_copy = false;
   }
 
   void BeginTest() override {
@@ -4924,6 +4925,7 @@ class LayerTreeHostTestSynchronousCompositeSwapPromise
   void InitializeSettings(LayerTreeSettings* settings) override {
     settings->single_thread_proxy_scheduler = false;
     settings->use_zero_copy = true;
+    settings->use_one_copy = false;
   }
 
   void BeginTest() override {