Turn Scope::locals_ into a ThreadedList

src/crankshaft/typing.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/crankshaft/typing.h"
 
 #include "src/ast/compile-time-value.h"
 #include "src/ast/scopes.h"
 #include "src/ast/variables.h"
 #include "src/frames-inl.h"
@@ skipping 67 matching lines @@
 #ifdef OBJECT_PRINT
   if (FLAG_trace_osr && FLAG_print_scopes) {
     PrintObserved(scope_->receiver(), frame->receiver(),
                   store_.LookupBounds(parameter_index(-1)).lower);
 
     for (int i = 0; i < params; i++) {
       PrintObserved(scope_->parameter(i), frame->GetParameter(i),
                     store_.LookupBounds(parameter_index(i)).lower);
     }
 
-    ZoneList<Variable*>* local_vars = scope_->locals();
     int local_index = 0;
-    for (int i = 0; i < local_vars->length(); i++) {
-      Variable* var = local_vars->at(i);
+    for (Variable* var : *scope_->locals()) {
       if (var->IsStackLocal()) {
         PrintObserved(
             var, frame->GetExpression(local_index),
             store_.LookupBounds(stack_local_index(local_index)).lower);
         local_index++;
       }
     }
   }
 #endif  // OBJECT_PRINT
 }
@@ skipping 690 matching lines @@
 }
 
 
 void AstTyper::VisitFunctionDeclaration(FunctionDeclaration* declaration) {
   RECURSE(Visit(declaration->fun()));
 }
 
 
 }  // namespace internal
 }  // namespace v8