Parse script tags with Fasta.

pkg/front_end/lib/src/fasta/parser/parser.dart

Index: pkg/front_end/lib/src/fasta/parser/parser.dart
diff --git a/pkg/front_end/lib/src/fasta/parser/parser.dart b/pkg/front_end/lib/src/fasta/parser/parser.dart
index 25c4f4f2fe5d9c164e95a137f63b9ba0482c645e..0c32649046d029954757cddbf44c97f3047e60d3 100644
--- a/pkg/front_end/lib/src/fasta/parser/parser.dart
+++ b/pkg/front_end/lib/src/fasta/parser/parser.dart
@@ -27,7 +27,8 @@ import '../scanner/precedence.dart'
         PrecedenceInfo,
         QUESTION_INFO,
         QUESTION_PERIOD_INFO,
-        RELATIONAL_PRECEDENCE;
+        RELATIONAL_PRECEDENCE,
+        SCRIPT_INFO;
 
 import '../scanner/token.dart'
     show
@@ -137,6 +138,9 @@ class Parser {
   }
 
   Token _parseTopLevelDeclaration(Token token) {
+    if (identical(token.info, SCRIPT_INFO)) {
+      return parseScript(token);
+    }
     token = parseMetadataStar(token);
     final String value = token.stringValue;
     if ((identical(value, 'abstract') && optional('class', token.next)) ||
@@ -390,6 +394,11 @@ class Parser {
     return token;
   }
 
+  Token parseScript(Token token) {
+    listener.handleScript(token);
+    return token.next;
+  }
+
   Token parseTypedef(Token token) {
     Token typedefKeyword = token;
     listener.beginFunctionTypeAlias(token);