tcmalloc: Honor HEAPPROFILE envvar only in profiling=1 builds.

third_party/tcmalloc/chromium/src/heap-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 644 matching lines @@
   SpinLockHolder l(&heap_lock);
 
   if (!is_on) return;
 
   heap_profile->DumpMarkedObjects(HeapProfileTable::MARK_TWO, filename);
 }
 
 //----------------------------------------------------------------------
 // Initialization/finalization code
 //----------------------------------------------------------------------
-
+#if defined(ENABLE_PROFILING)
 // Initialization code
 static void HeapProfilerInit() {
   // Everything after this point is for setting up the profiler based on envvar
   char fname[PATH_MAX];
   if (!GetUniquePathFromEnv(HEAPPROFILE, fname)) {
     return;
   }
   // We do a uid check so we don't write out files in a setuid executable.
 #ifdef HAVE_GETEUID
   if (getuid() != geteuid()) {
@@ skipping 10 matching lines @@
 
 // class used for finalization -- dumps the heap-profile at program exit
 struct HeapProfileEndWriter {
   ~HeapProfileEndWriter() { HeapProfilerDump("Exiting"); }
 };
 
 // We want to make sure tcmalloc is up and running before starting the profiler
 static const TCMallocGuard tcmalloc_initializer;
 REGISTER_MODULE_INITIALIZER(heapprofiler, HeapProfilerInit());
 static HeapProfileEndWriter heap_profile_end_writer;
+#endif   // defined(ENABLE_PROFILING)