Replace scoped_ptr with std::unique_ptr in //ui

ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc

Index: ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc
diff --git a/ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc b/ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc
index a2e2d2aed7eedf9f78c9d0288a91c09d51f91a4f..ec76ed25bf033109634e33d3cfbe2073e0089d3b 100644
--- a/ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc
+++ b/ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc
@@ -6,8 +6,9 @@
 
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/window.h"
@@ -129,7 +130,7 @@ class DesktopScreenX11Test : public views::ViewsTestBase,
     changed_display_.push_back(display);
   }
 
-  scoped_ptr<DesktopScreenX11> screen_;
+  std::unique_ptr<DesktopScreenX11> screen_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopScreenX11Test);
 };