Fix build failures on Win64 since r14215.

src/heap-snapshot-generator.cc

 // Copyright 2013 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 1930 matching lines @@
   // Record objects that are joined into ObjectGroups.
   isolate->heap()->CallGCPrologueCallbacks(major_gc_type);
 
   List<ObjectGroupConnection>* groups =
       isolate->global_handles()->object_groups();
   List<ObjectGroupRetainerInfo>* infos =
       isolate->global_handles()->retainer_infos();
   groups->Sort();
   infos->Sort();
 
-  int info_ix = 0;
+  int info_index = 0;
   UniqueId current_group_id(0);
-  size_t current_group_start = 0;
+  int current_group_start = 0;
 
   if (groups->length() > 0) {
     for (int i = 0; i <= groups->length(); ++i) {
       if (i == 0)
         current_group_id = groups->at(i).id;
       if (i == groups->length() ||
           current_group_id != groups->at(i).id) {
         // Group detected: objects in indices [current_group_start, i[.
-        if (info_ix < infos->length() &&
-            infos->at(info_ix).id == groups->at(current_group_start).id) {
+        if (info_index < infos->length() &&
+            infos->at(info_index).id == groups->at(current_group_start).id) {
           // Transfer the ownership of info.
           List<HeapObject*>* list =
-              GetListMaybeDisposeInfo(infos->at(info_ix).info);
-          infos->at(info_ix).info = NULL;
+              GetListMaybeDisposeInfo(infos->at(info_index).info);
+          infos->at(info_index).info = NULL;
           for (int j = current_group_start; j < i; ++j) {
             HeapObject* obj = HeapObject::cast(*(groups->at(j).object));
             list->Add(obj);
             in_groups_.Insert(obj);
           }
         }
         if (i < groups->length()) {
           current_group_id = groups->at(i).id;
           current_group_start = i;
         }
@@ skipping 742 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