Re-introduce ImportDeclaration to the parser

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/v8.h"
 
 #include "src/ast.h"
 #include "src/ast-numbering.h"
 #include "src/compiler.h"
 #include "src/scopes.h"
@@ skipping 168 matching lines @@
   DisableOptimization(kModuleDeclaration);
   VisitVariableProxy(node->proxy());
   Visit(node->module());
 }
 
 
 void AstNumberingVisitor::VisitImportDeclaration(ImportDeclaration* node) {
   IncrementNodeCount();
   DisableOptimization(kImportDeclaration);
   VisitVariableProxy(node->proxy());
-  Visit(node->module());
 }
 
 
 void AstNumberingVisitor::VisitModulePath(ModulePath* node) {
   IncrementNodeCount();
   DisableOptimization(kModulePath);
   Visit(node->module());
 }
 
 
@@ skipping 352 matching lines @@
 }
 
 
 bool AstNumbering::Renumber(Isolate* isolate, Zone* zone,
                             FunctionLiteral* function) {
   AstNumberingVisitor visitor(isolate, zone);
   return visitor.Renumber(function);
 }
 }
 }  // namespace v8::internal