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

components/handoff/handoff_manager.mm

 // Copyright 2014 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.
 
 #include "components/handoff/handoff_manager.h"
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
 #include "build/build_config.h"
 #include "net/base/mac/url_conversions.h"
@@ skipping 40 matching lines @@
 }
 
 - (void)updateActiveURL:(const GURL&)url {
 #if defined(OS_IOS)
   // Handoff is only available on iOS 8+.
   DCHECK(base::ios::IsRunningOnIOS8OrLater());
 #endif
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
   // Handoff is only available on OSX 10.10+.
-  DCHECK(base::mac::IsOSYosemiteOrLater());
+  DCHECK(base::mac::IsAtLeastOS10_10());
 #endif
 
   _activeURL = url;
   [self updateUserActivity];
 }
 
 - (BOOL)shouldUseActiveURL {
   return _activeURL.SchemeIsHTTPOrHTTPS();
 }
 
@@ skipping 19 matching lines @@
            withObject:handoff::kChromeHandoffActivityType];
   self.userActivity = base::scoped_nsobject<NSUserActivity>(userActivity);
   self.userActivity.webpageURL = net::NSURLWithGURL(_activeURL);
   NSString* origin = handoff::StringFromOrigin(_origin);
   DCHECK(origin);
   self.userActivity.userInfo = @{ handoff::kOriginKey : origin };
   [self.userActivity becomeCurrent];
 }
 
 @end