Bring heap snapshot Map iterator up to date.

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 1271 matching lines @@
                          raw_transitions_or_prototype_info,
                          Map::kTransitionsOrPrototypeInfoOffset);
   } else if (map->is_prototype_map()) {
     TagObject(raw_transitions_or_prototype_info, "prototype_info");
     SetInternalReference(map, entry, "prototype_info",
                          raw_transitions_or_prototype_info,
                          Map::kTransitionsOrPrototypeInfoOffset);
   }
   DescriptorArray* descriptors = map->instance_descriptors();
   TagObject(descriptors, "(map descriptors)");
-  SetInternalReference(map, entry,
-                       "descriptors", descriptors,
+  SetInternalReference(map, entry, "descriptors", descriptors,
                        Map::kDescriptorsOffset);
-
-  MarkAsWeakContainer(map->code_cache());
-  SetInternalReference(map, entry,
-                       "code_cache", map->code_cache(),
+  SetInternalReference(map, entry, "code_cache", map->code_cache(),
                        Map::kCodeCacheOffset);
-  SetInternalReference(map, entry,
-                       "prototype", map->prototype(), Map::kPrototypeOffset);
+  SetInternalReference(map, entry, "prototype", map->prototype(),
+                       Map::kPrototypeOffset);
+#if V8_DOUBLE_FIELDS_UNBOXING
+  if (FLAG_unbox_double_fields) {
+    SetInternalReference(map, entry, "layout_descriptor",
+                         map->layout_descriptor(),
+                         Map::kLayoutDescriptorOffset);
+  }
+#endif
   Object* constructor_or_backpointer = map->constructor_or_backpointer();
   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)");
@@ skipping 1805 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