cc: Add verify transform tree calculations to LayerTreeSettings

cc/layers/picture_layer_impl_unittest.cc

Index: cc/layers/picture_layer_impl_unittest.cc
diff --git a/cc/layers/picture_layer_impl_unittest.cc b/cc/layers/picture_layer_impl_unittest.cc
index bff36d6ff1c6e0cc74ad04e134a2815aca5a7fcd..dc99b52fc1f20174881c75a7af7e348864a9dfd1 100644
--- a/cc/layers/picture_layer_impl_unittest.cc
+++ b/cc/layers/picture_layer_impl_unittest.cc
@@ -93,6 +93,7 @@ class PictureLayerImplTest : public TestLayerTreeHostBase {
     settings.layer_transforms_should_scale_layer_contents = true;
     settings.create_low_res_tiling = true;
     settings.verify_clip_tree_calculations = true;
+    settings.verify_transform_tree_calculations = true;
     return settings;
   }