Cleanup in //runtime/bin

runtime/bin/log.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_LOG_H_
 #define BIN_LOG_H_
 
 #include <stdarg.h>
 
 #include "platform/globals.h"
 
-
 namespace dart {
 namespace bin {
 
 class Log {
  public:
   // Print formatted output for debugging.
   static void Print(const char* format, ...) PRINTF_ATTRIBUTE(1, 2) {
     va_list args;
     va_start(args, format);
     VPrint(format, args);
     va_end(args);
   }
 
   static void VPrint(const char* format, va_list args);
 
   static void PrintErr(const char* format, ...) PRINTF_ATTRIBUTE(1, 2) {
     va_list args;
     va_start(args, format);
     VPrintErr(format, args);
     va_end(args);
   }
 
   static void VPrintErr(const char* format, va_list args);
 
+ private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Log);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_LOG_H_