Remove stray comment from ast.cc

src/ast.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/ast.h"
 
 #include <cmath>  // For isfinite.
 #include "src/builtins.h"
 #include "src/code-stubs.h"
 #include "src/contexts.h"
@@ skipping 66 matching lines @@
       bit_field_(IsThisField::encode(is_this) | IsAssignedField::encode(false) |
                  IsResolvedField::encode(false)),
       variable_feedback_slot_(FeedbackVectorICSlot::Invalid()),
       raw_name_(name),
       interface_(interface) {}
 
 
 void VariableProxy::BindTo(Variable* var) {
   DCHECK(!FLAG_harmony_modules || interface_->IsUnified(var->interface()));
   DCHECK((is_this() && var->is_this()) || raw_name() == var->raw_name());
-  // Ideally CONST-ness should match. However, this is very hard to achieve
-  // because we don't know the exact semantics of conflicting (const and
-  // non-const) multiple variable declarations, const vars introduced via
-  // eval() etc.  Const-ness and variable declarations are a complete mess
-  // in JS. Sigh...
   set_var(var);
   set_is_resolved();
   var->set_is_used();
 }
 
 
 Assignment::Assignment(Zone* zone, Token::Value op, Expression* target,
                        Expression* value, int pos)
     : Expression(zone, pos),
       bit_field_(IsUninitializedField::encode(false) |
@@ skipping 922 matching lines @@
 // static
 bool Literal::Match(void* literal1, void* literal2) {
   const AstValue* x = static_cast<Literal*>(literal1)->raw_value();
   const AstValue* y = static_cast<Literal*>(literal2)->raw_value();
   return (x->IsString() && y->IsString() && *x->AsString() == *y->AsString()) ||
          (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber());
 }
 
 
 } }  // namespace v8::internal