Move Singleton and related structs to namespace base

content/browser/mach_broker_mac.h

 // 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.
 
 #ifndef CONTENT_BROWSER_MACH_BROKER_MAC_H_
 #define CONTENT_BROWSER_MACH_BROKER_MAC_H_
 
 #include <mach/mach.h>
 
 #include <map>
@@ skipping 64 matching lines @@
   void BrowserChildProcessCrashed(const ChildProcessData& data,
       int exit_code) override;
 
   // Implement |NotificationObserver|.
   void Observe(int type,
                const NotificationSource& source,
                const NotificationDetails& details) override;
 
  private:
   friend class MachBrokerTest;
-  friend struct DefaultSingletonTraits<MachBroker>;
+  friend struct base::DefaultSingletonTraits<MachBroker>;
 
   MachBroker();
   ~MachBroker() override;
 
   // Performs any initialization work.
   bool Init();
 
   // Message handler that is invoked on |dispatch_source_| when an
   // incoming message needs to be received.
   void HandleRequest();
@@ skipping 38 matching lines @@
 
   // Mutex that guards |mach_map_| and |child_process_id_map_|.
   mutable base::Lock lock_;
 
   DISALLOW_COPY_AND_ASSIGN(MachBroker);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MACH_BROKER_MAC_H_