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

sandbox/mac/launchd_interception_server.cc

 // 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 "sandbox/mac/launchd_interception_server.h"
 
 #include <servers/bootstrap.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 36 matching lines @@
     return false;
   }
   sandbox_port_.reset(port);
   if ((kr = mach_port_insert_right(task, sandbox_port_.get(),
           sandbox_port_.get(), MACH_MSG_TYPE_MAKE_SEND) != KERN_SUCCESS)) {
     MACH_LOG(ERROR, kr) << "Failed to allocate dummy sandbox port send right.";
     return false;
   }
   sandbox_send_port_.reset(sandbox_port_.get());
 
-  if (base::mac::IsOSYosemiteOrLater()) {
+  if (base::mac::IsAtLeastOS10_10()) {
     message_server_.reset(new XPCMessageServer(this, server_receive_right));
     xpc_launchd_ = true;
   } else {
     message_server_.reset(
         new MachMessageServer(this, server_receive_right, kBufferSize));
   }
   return message_server_->Initialize();
 }
 
 void LaunchdInterceptionServer::DemuxMessage(IPCMessage request) {
@@ skipping 105 matching lines @@
   if (xpc_launchd_) {
     // xpc_dictionary_set_mach_send increments the send right count.
     xpc_dictionary_set_mach_send(request.xpc, "domain-port",
                                  sandbox_->real_bootstrap_port());
   }
 
   message_server_->ForwardMessage(request, sandbox_->real_bootstrap_port());
 }
 
 }  // namespace sandbox