Fix a bug in heap profile tracing of closures.

src/profile-generator.cc

 // Copyright 2012 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 2139 matching lines @@
     obj->Iterate(&refs_extractor);
   }
 }
 
 
 void V8HeapExplorer::ExtractClosureReferences(JSObject* js_obj,
                                               HeapEntry* entry) {
   if (!js_obj->IsJSFunction()) return;
 
   JSFunction* func = JSFunction::cast(js_obj);
-  Context* context = func->context();
+  Context* context = func->context()->declaration_context();
   ScopeInfo* scope_info = context->closure()->shared()->scope_info();
 
   if (func->shared()->bound()) {
     FixedArray* bindings = func->function_bindings();
     SetNativeBindReference(js_obj, entry, "bound_this",
                            bindings->get(JSFunction::kBoundThisIndex));
     SetNativeBindReference(js_obj, entry, "bound_function",
                            bindings->get(JSFunction::kBoundFunctionIndex));
     for (int i = JSFunction::kBoundArgumentsStartIndex;
          i < bindings->length(); i++) {
@@ skipping 1728 matching lines @@
 
 
 void HeapSnapshotJSONSerializer::SortHashMap(
     HashMap* map, List<HashMap::Entry*>* sorted_entries) {
   for (HashMap::Entry* p = map->Start(); p != NULL; p = map->Next(p))
     sorted_entries->Add(p);
   sorted_entries->Sort(SortUsingEntryValue);
 }
 
 } }  // namespace v8::internal