Fix building with profilingsupport=off

src/heap.cc

 // Copyright 2011 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1510 matching lines @@
 static void InitializeScavengingVisitorsTables() {
   ScavengingVisitor<LOGGING_AND_PROFILING_DISABLED>::Initialize();
   ScavengingVisitor<LOGGING_AND_PROFILING_ENABLED>::Initialize();
   scavenging_visitors_table_.CopyFrom(
       ScavengingVisitor<LOGGING_AND_PROFILING_DISABLED>::GetTable());
   scavenging_visitors_table_mode_ = LOGGING_AND_PROFILING_DISABLED;
 }
 
 
 void Heap::SwitchScavengingVisitorsTableIfProfilingWasEnabled() {
+#ifdef ENABLE_LOGGING_AND_PROFILING
   if (scavenging_visitors_table_mode_ == LOGGING_AND_PROFILING_ENABLED) {
     // Table was already updated by some isolate.
     return;
   }
 
   if (isolate()->logger()->is_logging() |
       CpuProfiler::is_profiling(isolate()) ||
       (isolate()->heap_profiler() != NULL &&
        isolate()->heap_profiler()->is_profiling())) {
     // If one of the isolates is doing scavenge at this moment of time
     // it might see this table in an inconsitent state when
     // some of the callbacks point to
     // ScavengingVisitor<LOGGING_AND_PROFILING_ENABLED> and others
     // to ScavengingVisitor<LOGGING_AND_PROFILING_DISABLED>.
     // However this does not lead to any bugs as such isolate does not have
     // profiling enabled and any isolate with enabled profiling is guaranteed
     // to see the table in the consistent state.
     scavenging_visitors_table_.CopyFrom(
         ScavengingVisitor<LOGGING_AND_PROFILING_ENABLED>::GetTable());
 
     // We use Release_Store to prevent reordering of this write before writes
     // to the table.
     Release_Store(&scavenging_visitors_table_mode_,
                   LOGGING_AND_PROFILING_ENABLED);
   }
+#endif
 }
 
 
 void Heap::ScavengeObjectSlow(HeapObject** p, HeapObject* object) {
   ASSERT(HEAP->InFromSpace(object));
   MapWord first_word = object->map_word();
   ASSERT(!first_word.IsForwardingAddress());
   Map* map = first_word.ToMap();
   DoScavengeObject(map, p, object);
 }
@@ skipping 4355 matching lines @@
 }
 
 
 void ExternalStringTable::TearDown() {
   new_space_strings_.Free();
   old_space_strings_.Free();
 }
 
 
 } }  // namespace v8::internal