run iwyu on base!

base/global_descriptors_posix.cc

 // Copyright (c) 2009 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 <utility>
+#include <vector>
+
 #include "base/global_descriptors_posix.h"
-
-#include <vector>
-#include <utility>
-
 #include "base/logging.h"
+#include "base/singleton.h"
 
 namespace base {
 
 // static
 GlobalDescriptors* GlobalDescriptors::GetInstance() {
   typedef Singleton<base::GlobalDescriptors,
                     LeakySingletonTraits<base::GlobalDescriptors> >
       GlobalDescriptorsSingleton;
   return GlobalDescriptorsSingleton::get();
 }
@@ skipping 32 matching lines @@
 
 void GlobalDescriptors::Reset(const Mapping& mapping) {
   descriptors_ = mapping;
 }
 
 GlobalDescriptors::GlobalDescriptors() {}
 
 GlobalDescriptors::~GlobalDescriptors() {}
 
 }  // namespace base