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

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 RUNTIME_BIN_LOCKERS_H_
 #define RUNTIME_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();
   }
 
   virtual ~MutexLocker() { mutex_->Unlock(); }
 
  private:
   Mutex* const mutex_;
 
   DISALLOW_COPY_AND_ASSIGN(MutexLocker);
 };
 
-
 class MonitorLocker {
  public:
   explicit MonitorLocker(Monitor* monitor) : monitor_(monitor) {
     ASSERT(monitor != NULL);
     monitor_->Enter();
   }
 
   virtual ~MonitorLocker() { monitor_->Exit(); }
 
   Monitor::WaitResult Wait(int64_t millis = Monitor::kNoTimeout) {
     return monitor_->Wait(millis);
   }
 
   void Notify() { monitor_->Notify(); }
 
   void NotifyAll() { monitor_->NotifyAll(); }
 
  private:
   Monitor* const monitor_;
 
   DISALLOW_COPY_AND_ASSIGN(MonitorLocker);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // RUNTIME_BIN_LOCKERS_H_