"Deiceolate" Thread classes.

test/cctest/test-platform-tls.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 //
 // Tests of fast TLS support.
 
 #include "v8.h"
 
 #include "cctest.h"
 #include "checks.h"
 #include "platform.h"
 
@@ skipping 30 matching lines @@
   for (int i = 0; i < kValueCount; i++) {
     CHECK_EQ(GetValue(kValueCount - i - 1),
              Thread::GetThreadLocal(keys[i]));
     CHECK_EQ(GetValue(kValueCount - i - 1),
              Thread::GetExistingThreadLocal(keys[i]));
   }
 }
 
 class TestThread : public Thread {
  public:
-  TestThread() : Thread(NULL, "TestThread") {}
+  TestThread() : Thread("TestThread") {}
 
   virtual void Run() {
     DoTest();
   }
 };
 
 TEST(FastTLS) {
   for (int i = 0; i < kValueCount; i++) {
     keys[i] = Thread::CreateThreadLocalKey();
   }
   DoTest();
   TestThread thread;
   thread.Start();
   thread.Join();
 }