Fix building with profilingsupport=off

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 0a3b3d3f88da06fdfe2a745c2cbb7ecee076e000..99fd79ebd055154e1597a862b5fa786a4ee9c5dc 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -1528,6 +1528,7 @@ static void InitializeScavengingVisitorsTables() {
 
 
 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;
@@ -1553,6 +1554,7 @@ void Heap::SwitchScavengingVisitorsTableIfProfilingWasEnabled() {
     Release_Store(&scavenging_visitors_table_mode_,
                   LOGGING_AND_PROFILING_ENABLED);
   }
+#endif
 }