Cleanup in //runtime/bin

runtime/bin/lockers.h

 // Copyright (c) 2012, 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 BIN_LOCKERS_H_
 #define BIN_LOCKERS_H_
 
 #include "bin/thread.h"
 #include "platform/assert.h"
 
-
 namespace dart {
 namespace bin {
 
 class MutexLocker  {
  public:
   explicit MutexLocker(Mutex* mutex) : mutex_(mutex) {
     ASSERT(mutex != NULL);
     mutex_->Lock();
   }
 
@@ skipping 34 matching lines @@
  private:
   Monitor* const monitor_;
 
   DISALLOW_COPY_AND_ASSIGN(MonitorLocker);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_LOCKERS_H_