Extend scanner with new Harmony module keywords (under flag).

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index 25a409d805824c259917f00746c1fabe849c7077..d3eb069516c9c6e398ea68f3f53f95b954e4800b 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -547,12 +547,16 @@ Parser::Parser(Handle<Script> script,
       fni_(NULL),
       allow_natives_syntax_((parser_flags & kAllowNativesSyntax) != 0),
       allow_lazy_((parser_flags & kAllowLazy) != 0),
+      allow_modules_((parser_flags & kAllowModules) != 0),
       stack_overflow_(false),
       parenthesized_function_(false) {
   AstNode::ResetIds();
   if ((parser_flags & kLanguageModeMask) == EXTENDED_MODE) {
     scanner().SetHarmonyScoping(true);
   }
+  if ((parser_flags & kAllowModules) != 0) {
+    scanner().SetHarmonyModules(true);
+  }
 }
 
 
@@ -4271,7 +4275,8 @@ preparser::PreParser::PreParseResult Parser::LazyParseFunctionLiteral(
                                                    NULL,
                                                    stack_limit,
                                                    do_allow_lazy,
-                                                   allow_natives_syntax_);
+                                                   allow_natives_syntax_,
+                                                   allow_modules_);
   }
   preparser::PreParser::PreParseResult result =
       reusable_preparser_->PreParseLazyFunction(top_scope_->language_mode(),
@@ -5579,6 +5584,9 @@ bool ParserApi::Parse(CompilationInfo* info, int parsing_flags) {
     // Harmony scoping is requested.
     parsing_flags |= EXTENDED_MODE;
   }
+  if (!info->is_native() && FLAG_harmony_modules) {
+    parsing_flags |= kAllowModules;
+  }
   if (FLAG_allow_natives_syntax || info->is_native()) {
     // We require %identifier(..) syntax.
     parsing_flags |= kAllowNativesSyntax;