Move Singleton and related structs to namespace base

chrome/common/mac/launchd.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 "chrome/common/mac/launchd.h"
 
 #import <Foundation/Foundation.h>
 #include <launch.h>
 
 #include "base/mac/foundation_util.h"
@@ skipping 55 matching lines @@
               static_cast<int>(NSNetworkDomainMask),
               "NSNetworkDomainMask value changed");
 static_assert(static_cast<int>(Launchd::System) ==
               static_cast<int>(NSSystemDomainMask),
               "NSSystemDomainMask value changed");
 
 Launchd* Launchd::g_instance_ = NULL;
 
 Launchd* Launchd::GetInstance() {
   if (!g_instance_) {
-    g_instance_ = Singleton<Launchd>::get();
+    g_instance_ = base::Singleton<Launchd>::get();
   }
   return g_instance_;
 }
 
 void Launchd::SetInstance(Launchd* instance) {
   if (instance) {
     CHECK(!g_instance_);
   }
   g_instance_ = instance;
 }
@@ skipping 69 matching lines @@
   NSError* err = nil;
   if (![[NSFileManager defaultManager] removeItemAtPath:[ns_url path]
                                                   error:&err]) {
     if ([err code] != NSFileNoSuchFileError) {
       DLOG(ERROR) << "DeletePlist: " << base::mac::NSToCFCast(err);
     }
     return false;
   }
   return true;
 }