Cleanup Semaphore class.

tools/gyp/v8.gyp

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 425 matching lines @@
         '../../src/optimizing-compiler-thread.cc',
         '../../src/parser.cc',
         '../../src/parser.h',
         '../../src/platform/elapsed-timer.h',
         '../../src/platform/time.cc',
         '../../src/platform/time.h',
         '../../src/platform-posix.h',
         '../../src/platform.h',
         '../../src/platform/mutex.cc',
         '../../src/platform/mutex.h',
+        '../../src/platform/semaphore.cc',
+        '../../src/platform/semaphore.h',
         '../../src/preparse-data-format.h',
         '../../src/preparse-data.cc',
         '../../src/preparse-data.h',
         '../../src/preparser.cc',
         '../../src/preparser.h',
         '../../src/prettyprinter.cc',
         '../../src/prettyprinter.h',
         '../../src/profile-generator-inl.h',
         '../../src/profile-generator.cc',
         '../../src/profile-generator.h',
@@ skipping 607 matching lines @@
         }],
         ['v8_compress_startup_data=="bz2"', {
           'libraries': [
             '-lbz2',
           ]
         }],
       ],
     },
   ],
 }