Don't use TLS for space iterators.

src/heap-profiler.cc

Index: src/heap-profiler.cc
diff --git a/src/heap-profiler.cc b/src/heap-profiler.cc
index 45a93f9e14fbf71a912f447ac558c26a44aad7c2..ca8eda19ac74f0d2e9eb51b21cda1a2f46ed589f 100644
--- a/src/heap-profiler.cc
+++ b/src/heap-profiler.cc
@@ -33,8 +33,8 @@
 namespace v8 {
 namespace internal {
 
-HeapProfiler::HeapProfiler()
-    : snapshots_(new HeapSnapshotsCollection()),
+HeapProfiler::HeapProfiler(Heap* heap)
+    : snapshots_(new HeapSnapshotsCollection(heap)),
       next_snapshot_uid_(1) {
 }
 
@@ -45,15 +45,16 @@ HeapProfiler::~HeapProfiler() {
 
 
 void HeapProfiler::ResetSnapshots() {
+  Heap* the_heap = heap();
   delete snapshots_;
-  snapshots_ = new HeapSnapshotsCollection();
+  snapshots_ = new HeapSnapshotsCollection(the_heap);
 }
 
 
 void HeapProfiler::SetUp() {
   Isolate* isolate = Isolate::Current();
   if (isolate->heap_profiler() == NULL) {
-    isolate->set_heap_profiler(new HeapProfiler());
+    isolate->set_heap_profiler(new HeapProfiler(isolate->heap()));
   }
 }
 
@@ -139,7 +140,7 @@ HeapSnapshot* HeapProfiler::TakeSnapshotImpl(
   bool generation_completed = true;
   switch (s_type) {
     case HeapSnapshot::kFull: {
-      HeapSnapshotGenerator generator(result, control, resolver);
+      HeapSnapshotGenerator generator(result, control, resolver, heap());
       generation_completed = generator.GenerateSnapshot();
       break;
     }