Move Singleton and related structs to namespace base

ipc/ipc_logging.cc

 // 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.
 
 #include "ipc/ipc_logging.h"
 
 #ifdef IPC_MESSAGE_LOG_ENABLED
 #define IPC_MESSAGE_MACROS_LOG_ENABLED
 #endif
 
@@ skipping 59 matching lines @@
   if (logging_env_var_set) {
     enabled_ = true;
     enabled_on_stderr_ = true;
   }
 }
 
 Logging::~Logging() {
 }
 
 Logging* Logging::GetInstance() {
-  return Singleton<Logging>::get();
+  return base::Singleton<Logging>::get();
 }
 
 void Logging::SetConsumer(Consumer* consumer) {
   consumer_ = consumer;
 }
 
 void Logging::Enable() {
   enabled_ = true;
 }
 
@@ skipping 215 matching lines @@
     data->receive = message.received_time();
     data->dispatch = Time::Now().ToInternalValue();
     data->params = params;
     data->message_name = message_name;
   }
 }
 
 }
 
 #endif  // IPC_MESSAGE_LOG_ENABLED