Replace scoped_ptr with std::unique_ptr in //ui

ui/base/test/scoped_preferred_scroller_style_mac.h

Index: ui/base/test/scoped_preferred_scroller_style_mac.h
diff --git a/ui/base/test/scoped_preferred_scroller_style_mac.h b/ui/base/test/scoped_preferred_scroller_style_mac.h
index 9e56130dd6b8cd068107b312d1f62ecb8b6ee3a0..afeb718e7553949d01d55e48d6fc35e4316775ca 100644
--- a/ui/base/test/scoped_preferred_scroller_style_mac.h
+++ b/ui/base/test/scoped_preferred_scroller_style_mac.h
@@ -5,8 +5,9 @@
 #ifndef UI_BASE_TEST_SCOPED_PREFERRED_SCROLLER_STYLE_LEGACY_MAC_H_
 #define UI_BASE_TEST_SCOPED_PREFERRED_SCROLLER_STYLE_LEGACY_MAC_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 
 namespace base {
 namespace mac {
@@ -26,7 +27,7 @@ class ScopedPreferredScrollerStyle {
   ~ScopedPreferredScrollerStyle();
 
  private:
-  scoped_ptr<base::mac::ScopedObjCClassSwizzler> swizzler_;
+  std::unique_ptr<base::mac::ScopedObjCClassSwizzler> swizzler_;
 
   // True if the scrollbar style should overlay.
   bool overlay_;