Move Singleton and related structs to namespace base

content/common/sandbox_linux/sandbox_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 <dirent.h>
 #include <fcntl.h>
 #include <sys/resource.h>
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/types.h>
@@ skipping 107 matching lines @@
 #endif
 }
 
 LinuxSandbox::~LinuxSandbox() {
   if (pre_initialized_) {
     CHECK(initialize_sandbox_ran_);
   }
 }
 
 LinuxSandbox* LinuxSandbox::GetInstance() {
-  LinuxSandbox* instance = Singleton<LinuxSandbox>::get();
+  LinuxSandbox* instance = base::Singleton<LinuxSandbox>::get();
   CHECK(instance);
   return instance;
 }
 
 void LinuxSandbox::PreinitializeSandbox() {
   CHECK(!pre_initialized_);
   seccomp_bpf_supported_ = false;
 #if defined(ANY_OF_AMTLU_SANITIZER)
   // Sanitizers need to open some resources before the sandbox is enabled.
   // This should not fork, not launch threads, not open a directory.
@@ skipping 308 matching lines @@
 
 void LinuxSandbox::StopThreadAndEnsureNotCounted(base::Thread* thread) const {
   DCHECK(thread);
   base::ScopedFD proc_fd(OpenProc(proc_fd_));
   PCHECK(proc_fd.is_valid());
   CHECK(
       sandbox::ThreadHelpers::StopThreadAndWatchProcFS(proc_fd.get(), thread));
 }
 
 }  // namespace content