Turn Scope::locals_ into a ThreadedList

src/debug/liveedit.cc

 // Copyright 2012 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/debug/liveedit.h"
 
 #include "src/ast/scopes.h"
 #include "src/code-stubs.h"
 #include "src/compilation-cache.h"
 #include "src/compiler.h"
@@ skipping 1882 matching lines @@
 Handle<Object> LiveEditFunctionTracker::SerializeFunctionScope(Scope* scope) {
   Handle<JSArray> scope_info_list = isolate_->factory()->NewJSArray(10);
   int scope_info_length = 0;
 
   // Saves some description of scope. It stores name and indexes of
   // variables in the whole scope chain. Null-named slots delimit
   // scopes of this chain.
   Scope* current_scope = scope;
   while (current_scope != NULL) {
     HandleScope handle_scope(isolate_);
-    ZoneList<Variable*>* locals = current_scope->locals();
-    for (int i = 0; i < locals->length(); i++) {
-      Variable* var = locals->at(i);
+    for (Variable* var : *current_scope->locals()) {
       if (!var->IsContextSlot()) continue;
       int context_index = var->index() - Context::MIN_CONTEXT_SLOTS;
       int location = scope_info_length + context_index * 2;
       SetElementSloppy(scope_info_list, location, var->name());
       SetElementSloppy(scope_info_list, location + 1,
                        handle(Smi::FromInt(var->index()), isolate_));
     }
     scope_info_length += current_scope->ContextLocalCount() * 2;
     SetElementSloppy(scope_info_list, scope_info_length,
                      isolate_->factory()->null_value());
     scope_info_length++;
 
     current_scope = current_scope->outer_scope();
   }
 
   return scope_info_list;
 }
 
 }  // namespace internal
 }  // namespace v8