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

third_party/tcmalloc/chromium/src/raw_printer.cc

 // Copyright (c) 2008, 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 36 matching lines @@
   *limit_ = '\0';
 }
 
 void RawPrinter::Printf(const char* format, ...) {
   if (limit_ > ptr_) {
     va_list ap;
     va_start(ap, format);
     int avail = limit_ - ptr_;
     // We pass avail+1 to vsnprintf() since that routine needs room
     // to store the trailing \0.
-    const int r = vsnprintf(ptr_, avail+1, format, ap);
+    const int r = perftools_vsnprintf(ptr_, avail+1, format, ap);
     va_end(ap);
     if (r < 0) {
       // Perhaps an old glibc that returns -1 on truncation?
       ptr_ = limit_;
     } else if (r > avail) {
       // Truncation
       ptr_ = limit_;
     } else {
       ptr_ += r;
     }
   }
 }
 
 }