Fix issue 738: make compilable with profilingsupport=off

src/heap-profiler.cc

 // Copyright 2009 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 308 matching lines @@
 HeapProfiler::HeapProfiler()
     : snapshots_(new HeapSnapshotsCollection()),
       next_snapshot_uid_(1) {
 }
 
 
 HeapProfiler::~HeapProfiler() {
   delete snapshots_;
 }
 
+#endif  // ENABLE_LOGGING_AND_PROFILING
 
 void HeapProfiler::Setup() {
+#ifdef ENABLE_LOGGING_AND_PROFILING
   if (singleton_ == NULL) {
     singleton_ = new HeapProfiler();
   }
+#endif
 }
 
 
 void HeapProfiler::TearDown() {
+#ifdef ENABLE_LOGGING_AND_PROFILING
   delete singleton_;
   singleton_ = NULL;
+#endif
 }
 
 
+#ifdef ENABLE_LOGGING_AND_PROFILING
+
 HeapSnapshot* HeapProfiler::TakeSnapshot(const char* name) {
   ASSERT(singleton_ != NULL);
   return singleton_->TakeSnapshotImpl(name);
 }
 
 
 HeapSnapshot* HeapProfiler::TakeSnapshot(String* name) {
   ASSERT(singleton_ != NULL);
   return singleton_->TakeSnapshotImpl(name);
 }
@@ skipping 402 matching lines @@
   GlobalHandles::MakeWeak(handle.location(),
                           static_cast<void*>(stack.start()),
                           StackWeakReferenceCallback);
 }
 
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 
 } }  // namespace v8::internal