Merge google-perftools r109 (the current contents of third_party/tcmalloc/vendor)

third_party/tcmalloc/chromium/src/profiler.cc

 // Copyright (c) 2005, Google 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:
 //
 //     * 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
@@ skipping 93 matching lines @@
   // ProfileHandle that only one instance of prof_handler can run at a time.
   SpinLock      lock_;
   ProfileData   collector_;
 
   // Filter function and its argument, if any.  (NULL means include all
   // samples).  Set at start, read-only while running.  Written while holding
   // lock_, read and executed in the context of SIGPROF interrupt.
   int           (*filter_)(void*);
   void*         filter_arg_;
 
-  // Opague token returned by the profile handler. To be used when calling
+  // Opaque token returned by the profile handler. To be used when calling
   // ProfileHandlerUnregisterCallback.
   ProfileHandlerToken* prof_handler_token_;
 
   // Sets up a callback to receive SIGPROF interrupt.
   void EnableHandler();
 
   // Disables receiving SIGPROF interrupt.
   void DisableHandler();
 
   // Signal handler that records the interrupted pc in the profile data.
@@ skipping 208 matching lines @@
 extern "C" void ProfilerStop() { }
 extern "C" void ProfilerGetCurrentState(ProfilerState* state) {
   memset(state, 0, sizeof(*state));
 }
 
 #endif  // OS_CYGWIN
 
 // DEPRECATED routines
 extern "C" PERFTOOLS_DLL_DECL void ProfilerEnable() { }
 extern "C" PERFTOOLS_DLL_DECL void ProfilerDisable() { }