Replace scoped_ptr with std::unique_ptr in //ui

ui/display/manager/display_layout_builder.cc

Index: ui/display/manager/display_layout_builder.cc
diff --git a/ui/display/manager/display_layout_builder.cc b/ui/display/manager/display_layout_builder.cc
index 8376e74313db39350b3b448d0a7ecef2b221df07..64fe65071ad95d72184c8eba7aa84e919a906f6a 100644
--- a/ui/display/manager/display_layout_builder.cc
+++ b/ui/display/manager/display_layout_builder.cc
@@ -57,7 +57,7 @@ DisplayLayoutBuilder& DisplayLayoutBuilder::SetSecondaryPlacement(
   return *this;
 }
 
-scoped_ptr<DisplayLayout> DisplayLayoutBuilder::Build() {
+std::unique_ptr<DisplayLayout> DisplayLayoutBuilder::Build() {
   std::sort(layout_->placement_list.begin(), layout_->placement_list.end(),
             [](const DisplayPlacement& a, const DisplayPlacement& b) {
               return a.display_id < b.display_id;