third_party/WebKit: fix typos found in comments

third_party/WebKit/Source/wtf/ThreadingWin.cpp

 /*
  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile, Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 222 matching lines @@
 
     res = WaitForSingleObject(m_unblockLock, INFINITE);
     ASSERT_UNUSED(res, res == WAIT_OBJECT_0);
 
     int signalsLeft = m_waitersToUnblock;
 
     if (m_waitersToUnblock) {
         --m_waitersToUnblock;
     } else if (++m_waitersGone == (INT_MAX / 2)) {
         // timeout/canceled or spurious semaphore timeout or spurious wakeup
-        // occured, normalize the m_waitersGone count this may occur if many
+        // occurred, normalize the m_waitersGone count this may occur if many
         // calls to wait with a timeout are made and no call to notify_* is made
         res = WaitForSingleObject(m_blockLock, INFINITE);
         ASSERT_UNUSED(res, res == WAIT_OBJECT_0);
         m_waitersBlocked -= m_waitersGone;
         res = ReleaseSemaphore(m_blockLock, 1, 0);
         ASSERT_UNUSED(res, res);
         m_waitersGone = 0;
     }
 
     res = ReleaseMutex(m_unblockLock);
@@ skipping 150 matching lines @@
 
 void willCreateThread()
 {
     s_threadCreated = true;
 }
 #endif
 
 } // namespace WTF
 
 #endif // OS(WIN)