Revert of Parse arrow functions at proper precedence level

src/ast-numbering.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-numbering.h"
 
 #include "src/ast.h"
 #include "src/scopes.h"
 
 namespace v8 {
@@ skipping 353 matching lines @@
 }
 
 
 void AstNumberingVisitor::VisitSpread(Spread* node) {
   IncrementNodeCount();
   DisableOptimization(kSpread);
   Visit(node->expression());
 }
 
 
-void AstNumberingVisitor::VisitEmptyParentheses(EmptyParentheses* node) {
-  UNREACHABLE();
-}
-
-
 void AstNumberingVisitor::VisitForInStatement(ForInStatement* node) {
   IncrementNodeCount();
   DisableSelfOptimization();
   node->set_base_id(ReserveIdRange(ForInStatement::num_ids()));
   Visit(node->each());
   Visit(node->enumerable());
   Visit(node->body());
   ReserveFeedbackSlots(node);
 }
 
@@ skipping 185 matching lines @@
 }
 
 
 bool AstNumbering::Renumber(Isolate* isolate, Zone* zone,
                             FunctionLiteral* function) {
   AstNumberingVisitor visitor(isolate, zone);
   return visitor.Renumber(function);
 }
 }  // namespace internal
 }  // namespace v8