Move some files in base to base/memory.

base/global_descriptors_posix.h

 // 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.
 
 #ifndef BASE_GLOBAL_DESCRIPTORS_POSIX_H_
 #define BASE_GLOBAL_DESCRIPTORS_POSIX_H_
 #pragma once
 
 #include "build/build_config.h"
 
 #include <vector>
 #include <utility>
 
 #include <stdint.h>
 
-#include "base/singleton.h"
+#include "base/memory/singleton.h"
 
 namespace base {
 
 // It's common practice to install file descriptors into well known slot
 // numbers before execing a child; stdin, stdout and stderr are ubiqutous
 // examples.
 //
 // However, when using a zygote model, this becomes troublesome. Since the
 // descriptors which need to be in these slots generally aren't known, any code
 // could open a resource and take one of the reserved descriptors. Simply
@@ skipping 34 matching lines @@
   friend struct DefaultSingletonTraits<GlobalDescriptors>;
   GlobalDescriptors();
   ~GlobalDescriptors();
 
   Mapping descriptors_;
 };
 
 }  // namespace base
 
 #endif  // BASE_GLOBAL_DESCRIPTORS_POSIX_H_