cc: Turn impl_side_painting and use_one_copy on in LayerTreeSettings.

cc/layers/scrollbar_layer_unittest.cc

Index: cc/layers/scrollbar_layer_unittest.cc
diff --git a/cc/layers/scrollbar_layer_unittest.cc b/cc/layers/scrollbar_layer_unittest.cc
index af7a100dae0fcb9f17b63a6a0580b2e35ed3101e..dc432ccb9578d4a0bace9609cbec22b7254f3555 100644
--- a/cc/layers/scrollbar_layer_unittest.cc
+++ b/cc/layers/scrollbar_layer_unittest.cc
@@ -121,10 +121,13 @@ class ScrollbarLayerTest : public testing::Test {
  public:
   ScrollbarLayerTest() : fake_client_(FakeLayerTreeHostClient::DIRECT_3D) {
     layer_tree_settings_.single_thread_proxy_scheduler = false;
+    layer_tree_settings_.use_zero_copy = true;
+    layer_tree_settings_.use_one_copy = false;
 
     LayerTreeHost::InitParams params;
     params.client = &fake_client_;
     params.settings = &layer_tree_settings_;
+    params.task_graph_runner = &task_graph_runner_;
 
     layer_tree_host_.reset(
         new FakeResourceTrackingLayerTreeHost(&fake_client_, &params));
@@ -138,6 +141,7 @@ class ScrollbarLayerTest : public testing::Test {
 
  protected:
   FakeLayerTreeHostClient fake_client_;
+  TestTaskGraphRunner task_graph_runner_;
   LayerTreeSettings layer_tree_settings_;
   LayerSettings layer_settings_;
   scoped_ptr<FakeResourceTrackingLayerTreeHost> layer_tree_host_;