UI Compositor: Disable external animation host for ui::Compositor (Aura)

ui/compositor/layer.cc

Index: ui/compositor/layer.cc
diff --git a/ui/compositor/layer.cc b/ui/compositor/layer.cc
index 31946b9ecefb6c404f30ab09e84636b6a7562ebf..e1fac1a6519cb9b179be711baa7c6ea092f141b2 100644
--- a/ui/compositor/layer.cc
+++ b/ui/compositor/layer.cc
@@ -129,8 +129,8 @@ const cc::LayerSettings& Layer::UILayerSettings() {
 void Layer::InitializeUILayerSettings() {
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   g_ui_layer_settings.Get().use_compositor_animation_timelines =
-      !command_line->HasSwitch(
-          switches::kUIDisableCompositorAnimationTimelines);
+      command_line->HasSwitch(
+          switches::kUIEnableCompositorAnimationTimelines);
 }
 
 const Compositor* Layer::GetCompositor() const {