Re-write many calls to WrapUnique() with MakeUnique()

ui/views/style/platform_style_mac.mm

Index: ui/views/style/platform_style_mac.mm
diff --git a/ui/views/style/platform_style_mac.mm b/ui/views/style/platform_style_mac.mm
index d10a483690b9f589581efc3ac0d84320fd54fb78..0d433480bfd1dfdca296d7a31376d3f7aaa44e19 100644
--- a/ui/views/style/platform_style_mac.mm
+++ b/ui/views/style/platform_style_mac.mm
@@ -52,21 +52,21 @@ std::unique_ptr<FocusableBorder> PlatformStyle::CreateComboboxBorder() {
 // static
 std::unique_ptr<Background> PlatformStyle::CreateComboboxBackground(
     int shoulder_width) {
-  return base::WrapUnique(new ComboboxBackgroundMac(shoulder_width));
+  return base::MakeUnique<ComboboxBackgroundMac>(shoulder_width);
 }
 
 // static
 std::unique_ptr<LabelButtonBorder> PlatformStyle::CreateLabelButtonBorder(
     Button::ButtonStyle style) {
   if (style == Button::STYLE_BUTTON)
-    return base::WrapUnique(new DialogButtonBorderMac());
+    return base::MakeUnique<DialogButtonBorderMac>();
 
-  return base::WrapUnique(new LabelButtonAssetBorder(style));
+  return base::MakeUnique<LabelButtonAssetBorder>(style);
 }
 
 // static
 std::unique_ptr<ScrollBar> PlatformStyle::CreateScrollBar(bool is_horizontal) {
-  return base::WrapUnique(new CocoaScrollBar(is_horizontal));
+  return base::MakeUnique<CocoaScrollBar>(is_horizontal);
 }
 
 // static