base::mac::IsOSSierra() -> base::mac::IsOS10_12(), etc.

ui/native_theme/native_theme_mac_unittest.cc

Index: ui/native_theme/native_theme_mac_unittest.cc
diff --git a/ui/native_theme/native_theme_mac_unittest.cc b/ui/native_theme/native_theme_mac_unittest.cc
index cd8d49bcf9f7485193c7a2a171eab97780c5ead1..5d5f748fe145ebfcdb45a5411b8226aa66a8f241 100644
--- a/ui/native_theme/native_theme_mac_unittest.cc
+++ b/ui/native_theme/native_theme_mac_unittest.cc
@@ -41,7 +41,7 @@ TEST_F(NativeThemeMacTest, SystemColorSpotChecks) {
   const SkColor kWindowColorYosemite = SkColorSetARGB(255, 236, 236, 236);
   SkColor dialogColor =
       native_theme->GetSystemColor(NativeTheme::kColorId_WindowBackground);
-  if (base::mac::IsOSYosemiteOrLater())
+  if (base::mac::IsAtLeastOS10_10())
     EXPECT_EQ(dialogColor, kWindowColorYosemite);
   else
     EXPECT_EQ(dialogColor, kWindowColorCatsMavericks);