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

chrome/browser/app_controller_mac.mm

 // Copyright (c) 2012 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 "chrome/browser/app_controller_mac.h"
 
 #include <stddef.h>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
@@ skipping 1624 matching lines @@
 }
 
 - (void)application:(NSApplication*)application
     didFailToContinueUserActivityWithType:(NSString*)userActivityType
                                     error:(NSError*)error {
 }
 
 #pragma mark - Handoff Manager
 
 - (BOOL)shouldUseHandoff {
-  return base::mac::IsOSYosemiteOrLater();
+  return base::mac::IsAtLeastOS10_10();
 }
 
 - (void)passURLToHandoffManager:(const GURL&)handoffURL {
   [handoffManager_ updateActiveURL:handoffURL];
 }
 
 - (void)updateHandoffManager:(content::WebContents*)webContents {
   if (![self shouldUseHandoff])
     return;
 
@@ skipping 34 matching lines @@
 
 //---------------------------------------------------------------------------
 
 namespace app_controller_mac {
 
 bool IsOpeningNewWindow() {
   return g_is_opening_new_window;
 }
 
 }  // namespace app_controller_mac