[NOT TO COMMIT!] Merge Chromium-specific changes in tcmalloc thru. the original gperftools r136.

third_party/tcmalloc/chromium/src/google/profiler.h

Index: third_party/tcmalloc/chromium/src/google/profiler.h
diff --git a/third_party/tcmalloc/chromium/src/google/profiler.h b/third_party/tcmalloc/chromium/src/google/profiler.h
index 7971e04442facc9d05a6ece210981d4bf1695369..07323e450bfa500596cad0ae7827732c8a57ca6e 100644
--- a/third_party/tcmalloc/chromium/src/google/profiler.h
+++ b/third_party/tcmalloc/chromium/src/google/profiler.h
@@ -108,15 +108,13 @@ struct ProfilerOptions {
   void *filter_in_thread_arg;
 };
 
-/* Start profiling and write profile info into fname, discarding any
- * existing profiling data in that file.
+/* Start profiling and write profile info into fname.
  *
  * This is equivalent to calling ProfilerStartWithOptions(fname, NULL).
  */
 PERFTOOLS_DLL_DECL int ProfilerStart(const char* fname);
 
-/* Start profiling and write profile into fname, discarding any
- * existing profiling data in that file.
+/* Start profiling and write profile into fname.
  *
  * The profiler is configured using the options given by 'options'.
  * Options which are not specified are given default values.