Extend AST with basic module constructs (yet unused).

src/rewriter.cc

Index: src/rewriter.cc
diff --git a/src/rewriter.cc b/src/rewriter.cc
index b08fed34e138829bd147e5f033785cd92839f631..8308792baa8a00d1e38bb887bf828768caf3cdec 100644
--- a/src/rewriter.cc
+++ b/src/rewriter.cc
@@ -210,6 +210,11 @@ void Processor::VisitWithStatement(WithStatement* node) {
 
 // Do nothing:
 void Processor::VisitVariableDeclaration(VariableDeclaration* node) {}
+void Processor::VisitModuleDeclaration(ModuleDeclaration* node) {}
+void Processor::VisitModuleLiteral(ModuleLiteral* node) {}
+void Processor::VisitModuleVariable(ModuleVariable* node) {}
+void Processor::VisitModulePath(ModulePath* node) {}
+void Processor::VisitModuleUrl(ModuleUrl* node) {}
 void Processor::VisitEmptyStatement(EmptyStatement* node) {}
 void Processor::VisitReturnStatement(ReturnStatement* node) {}
 void Processor::VisitDebuggerStatement(DebuggerStatement* node) {}