Move Singleton and related structs to namespace base

content/browser/renderer_host/render_sandbox_host_linux.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 "content/browser/renderer_host/render_sandbox_host_linux.h"
 
 #include <sys/socket.h>
 
 #include "base/memory/singleton.h"
 #include "base/posix/eintr_wrapper.h"
 
 namespace content {
 
 // Runs on the main thread at startup.
 RenderSandboxHostLinux::RenderSandboxHostLinux()
     : initialized_(false), renderer_socket_(0), childs_lifeline_fd_(0) {
 }
 
 // static
 RenderSandboxHostLinux* RenderSandboxHostLinux::GetInstance() {
-  return Singleton<RenderSandboxHostLinux>::get();
+  return base::Singleton<RenderSandboxHostLinux>::get();
 }
 
 void RenderSandboxHostLinux::Init() {
   DCHECK(!initialized_);
   initialized_ = true;
 
   int fds[2];
   // We use SOCK_SEQPACKET rather than SOCK_DGRAM to prevent the renderer from
   // sending datagrams to other sockets on the system. The sandbox may prevent
   // the renderer from calling socket() to create new sockets, but it'll still
@@ skipping 33 matching lines @@
     if (!ShutdownIPCChannel())
       LOG(ERROR) << "ShutdownIPCChannel failed";
     if (IGNORE_EINTR(close(renderer_socket_)) < 0)
       PLOG(ERROR) << "close";
 
     ipc_thread_->Join();
   }
 }
 
 }  // namespace content