run iwyu on base!

base/threading/thread_collision_warner.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 "base/threading/thread_collision_warner.h"
-
+#include "base/atomicops.h"
+#include "base/atomicops_internals_x86_macosx.h"
 #include "base/logging.h"
 #include "base/threading/platform_thread.h"
+#include "base/threading/thread_collision_warner.h"
 
 namespace base {
 
 void DCheckAsserter::warn() {
   NOTREACHED() << "Thread Collision";
 }
 
 static subtle::Atomic32 CurrentThread() {
   const PlatformThreadId current_thread_id = PlatformThread::CurrentId();
   // We need to get the thread id into an atomic data type. This might be a
@@ skipping 36 matching lines @@
   subtle::NoBarrier_AtomicIncrement(&counter_, 1);
 }
 
 void ThreadCollisionWarner::Leave() {
   if (subtle::Barrier_AtomicIncrement(&counter_, -1) == 0) {
     subtle::NoBarrier_Store(&valid_thread_id_, 0);
   }
 }
 
 }  // namespace base