Add a new GetInstance() method for singleton classes used in chrome/browser files.

chrome/browser/renderer_host/render_sandbox_host_linux.cc

 // Copyright (c) 2010 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/browser/renderer_host/render_sandbox_host_linux.h"
 
 #include <fcntl.h>
 #include <fontconfig/fontconfig.h>
 #include <stdint.h>
 #include <unistd.h>
@@ skipping 625 matching lines @@
 // -----------------------------------------------------------------------------
 
 // Runs on the main thread at startup.
 RenderSandboxHostLinux::RenderSandboxHostLinux()
     : initialized_(false),
       renderer_socket_(0),
       childs_lifeline_fd_(0),
       pid_(0) {
 }
 
+// static
+RenderSandboxHostLinux* RenderSandboxHostLinux::GetInstance() {
+  return Singleton<RenderSandboxHostLinux>::get();
+}
+
 void RenderSandboxHostLinux::Init(const std::string& sandbox_path) {
   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
   // inherit some sockets. With PF_UNIX+SOCK_DGRAM, it can call sendmsg to send
   // a datagram to any (abstract) socket on the same system. With
@@ skipping 17 matching lines @@
 }
 
 RenderSandboxHostLinux::~RenderSandboxHostLinux() {
   if (initialized_) {
     if (HANDLE_EINTR(close(renderer_socket_)) < 0)
       PLOG(ERROR) << "close";
     if (HANDLE_EINTR(close(childs_lifeline_fd_)) < 0)
       PLOG(ERROR) << "close";
   }
 }