Add Map::weak_cell_cache internal link to heap snapshot.

src/profiler/heap-snapshot-generator.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/profiler/heap-snapshot-generator.h"
 
 #include "src/code-stubs.h"
 #include "src/conversions.h"
 #include "src/debug/debug.h"
 #include "src/objects-body-descriptors.h"
@@ skipping 1302 matching lines @@
   if (constructor_or_backpointer->IsMap()) {
     TagObject(constructor_or_backpointer, "(back pointer)");
     SetInternalReference(map, entry, "back_pointer", constructor_or_backpointer,
                          Map::kConstructorOrBackPointerOffset);
   } else {
     SetInternalReference(map, entry, "constructor", constructor_or_backpointer,
                          Map::kConstructorOrBackPointerOffset);
   }
   TagObject(map->dependent_code(), "(dependent code)");
   MarkAsWeakContainer(map->dependent_code());
-  SetInternalReference(map, entry,
-                       "dependent_code", map->dependent_code(),
+  SetInternalReference(map, entry, "dependent_code", map->dependent_code(),
                        Map::kDependentCodeOffset);
+  TagObject(map->weak_cell_cache(), "(weak cell)");
+  SetInternalReference(map, entry, "weak_cell_cache", map->weak_cell_cache(),
+                       Map::kWeakCellCacheOffset);
 }
 
 
 void V8HeapExplorer::ExtractSharedFunctionInfoReferences(
     int entry, SharedFunctionInfo* shared) {
   HeapObject* obj = shared;
   String* shared_name = shared->DebugName();
   const char* name = NULL;
   if (shared_name != *heap_->isolate()->factory()->empty_string()) {
     name = names_->GetName(shared_name);
@@ skipping 1789 matching lines @@
   for (int i = 1; i < sorted_strings.length(); ++i) {
     writer_->AddCharacter(',');
     SerializeString(sorted_strings[i]);
     if (writer_->aborted()) return;
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8