Eliminate dominator and retained_size fields. They are calculating on front-end side.

src/profile-generator-inl.h

 // Copyright 2010 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 100 matching lines @@
 
 
 int HeapEntry::set_children_index(int index) {
   children_index_ = index;
   int next_index = index + children_count_;
   children_count_ = 0;
   return next_index;
 }
 
 
-int HeapEntry::set_retainers_index(int index) {
-  retainers_index_ = index;
-  int next_index = index + retainers_count_;
-  retainers_count_ = 0;
-  return next_index;
-}
-
-
 HeapGraphEdge** HeapEntry::children_arr() {
   ASSERT(children_index_ >= 0);
   return &snapshot_->children()[children_index_];
 }
 
 
-HeapGraphEdge** HeapEntry::retainers_arr() {
-  ASSERT(retainers_index_ >= 0);
-  return &snapshot_->retainers()[retainers_index_];
-}
-
-
-HeapEntry* HeapEntry::dominator() const {
-  ASSERT(dominator_ >= 0);
-  return &snapshot_->entries()[dominator_];
-}
-
-
 SnapshotObjectId HeapObjectsMap::GetNthGcSubrootId(int delta) {
   return kGcRootsFirstSubrootId + delta * kObjectIdStep;
 }
 
 
 HeapObject* V8HeapExplorer::GetNthGcSubrootObject(int delta) {
   return reinterpret_cast<HeapObject*>(
       reinterpret_cast<char*>(kFirstGcSubrootObject) +
       delta * HeapObjectsMap::kObjectIdStep);
 }
 
 
 int V8HeapExplorer::GetGcSubrootOrder(HeapObject* subroot) {
   return static_cast<int>(
       (reinterpret_cast<char*>(subroot) -
        reinterpret_cast<char*>(kFirstGcSubrootObject)) /
       HeapObjectsMap::kObjectIdStep);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROFILE_GENERATOR_INL_H_