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

third_party/WebKit/Source/platform/mac/VersionUtilMacTest.mm

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "platform/mac/VersionUtilMac.h"
 
 #include <AppKit/AppKit.h>
 #include <gtest/gtest.h>
 
 #ifndef NSAppKitVersionNumber10_9
@@ skipping 11 matching lines @@
 // AppKit.framework does not provide an NSAppKitVersionNumber preprocessor
 // definition for OSX 10.11.
 #define NSAppKitVersionNumber10_11Max 1389
 
 // AppKit version is loosely correlated to OSX version. It's still useful as a
 // sanity check in unit tests, though we don't want to rely on it in production
 // code.
 TEST(VersionUtilMac, AppKitVersions)
 {
     if (floor(NSAppKitVersionNumber) == NSAppKitVersionNumber10_9) {
-        EXPECT_TRUE(blink::IsOSMavericks());
-        EXPECT_FALSE(blink::IsOSYosemite());
-        EXPECT_FALSE(blink::IsOSElCapitan());
+        EXPECT_TRUE(blink::IsOS10_9());
+        EXPECT_FALSE(blink::IsOS10_10());
+        EXPECT_FALSE(blink::IsOS10_11());
         return;
     }
 
     if (floor(NSAppKitVersionNumber) <= NSAppKitVersionNumber10_10Max &&
         floor(NSAppKitVersionNumber) >=  NSAppKitVersionNumber10_10) {
-        EXPECT_FALSE(blink::IsOSMavericks());
-        EXPECT_TRUE(blink::IsOSYosemite());
-        EXPECT_FALSE(blink::IsOSElCapitan());
+        EXPECT_FALSE(blink::IsOS10_9());
+        EXPECT_TRUE(blink::IsOS10_10());
+        EXPECT_FALSE(blink::IsOS10_11());
         return;
     }
 
     if (floor(NSAppKitVersionNumber) == NSAppKitVersionNumber10_11Max) {
-        EXPECT_FALSE(blink::IsOSMavericks());
-        EXPECT_FALSE(blink::IsOSYosemite());
-        EXPECT_TRUE(blink::IsOSElCapitan());
+        EXPECT_FALSE(blink::IsOS10_9());
+        EXPECT_FALSE(blink::IsOS10_10());
+        EXPECT_TRUE(blink::IsOS10_11());
         return;
     }
 }