Move Singleton and related structs to namespace base

content/browser/mach_broker_mac.mm

 // Copyright (c) 2011 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 "content/browser/mach_broker_mac.h"
 
 #include <bsm/libbsm.h>
 #include <servers/bootstrap.h>
 
 #include "base/bind.h"
@@ skipping 60 matching lines @@
       0, MACH_PORT_NULL, 100 /*milliseconds*/, MACH_PORT_NULL);
   if (kr != KERN_SUCCESS) {
     MACH_LOG(ERROR, kr) << "mach_msg";
     return false;
   }
 
   return true;
 }
 
 MachBroker* MachBroker::GetInstance() {
-  return Singleton<MachBroker, LeakySingletonTraits<MachBroker>>::get();
+  return base::Singleton<MachBroker,
+                         base::LeakySingletonTraits<MachBroker>>::get();
 }
 
 base::Lock& MachBroker::GetLock() {
   return lock_;
 }
 
 void MachBroker::EnsureRunning() {
   lock_.AssertAcquired();
 
   if (initialized_)
@@ skipping 169 matching lines @@
                  NotificationService::AllBrowserContextsAndSources());
   registrar_.Add(this, NOTIFICATION_RENDERER_PROCESS_TERMINATED,
                  NotificationService::AllBrowserContextsAndSources());
 
   // No corresponding StopObservingBrowserChildProcesses,
   // we leak this singleton.
   BrowserChildProcessObserver::Add(this);
 }
 
 }  // namespace content