Fixed test memory leaks

src/platform-linux.cc

 // Copyright 2006-2008 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 449 matching lines @@
   explicit PlatformData(ThreadHandle::Kind kind) {
     Initialize(kind);
   }
 
   void Initialize(ThreadHandle::Kind kind) {
     switch (kind) {
       case ThreadHandle::SELF: thread_ = pthread_self(); break;
       case ThreadHandle::INVALID: thread_ = kNoThread; break;
     }
   }
+
   pthread_t thread_;  // Thread handle for pthread.
 };
 
 
 ThreadHandle::ThreadHandle(Kind kind) {
   data_ = new PlatformData(kind);
 }
 
 
 void ThreadHandle::Initialize(ThreadHandle::Kind kind) {
@@ skipping 276 matching lines @@
   }
 
   // This sampler is no longer the active sampler.
   active_sampler_ = NULL;
   active_ = false;
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal