VM: Re-format to use at most one newline between functions

runtime/vm/thread_barrier.h

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_THREAD_BARRIER_H_
 #define RUNTIME_VM_THREAD_BARRIER_H_
 
 #include "vm/globals.h"
+#include "vm/lockers.h"
 #include "vm/os_thread.h"
-#include "vm/lockers.h"
 
 namespace dart {
 
 // Thread barrier with:
 // * fixed (at construction) number n of participating threads {T1,T2,T3,...,Tn}
 // * unknown number of rounds.
 // Requirements:
 // * there is some R such that each participating thread makes
 //   R calls to Sync() followed by its one and only call to Exit().
 // Guarantees:
@@ skipping 90 matching lines @@
 
   Monitor* done_monitor_;  // TODO(koda): Try to optimize this away.
   bool done_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadBarrier);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_THREAD_BARRIER_H_