Parse script tags with Fasta.

pkg/front_end/lib/src/fasta/kernel/body_builder.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library fasta.body_builder;
 
 import '../parser/parser.dart' show FormalParameterType, optional;
 
 import '../parser/error_kind.dart' show ErrorKind;
 
@@ skipping 794 matching lines @@
           expressions.add(toValue(part));
         }
       }
       expressions
           .add(new StringLiteral(unescapeLastStringPart(last.value, quote)));
       push(new StringConcatenation(expressions));
     }
   }
 
   @override
+  void handleScript(Token token) {
+    debugEvent("Script");
+  }
+
+  @override
   void handleStringJuxtaposition(int literalCount) {
     debugEvent("StringJuxtaposition");
     List<Expression> parts = popListForValue(literalCount);
     List<Expression> expressions;
     // Flatten string juxtapositions of string interpolation.
     for (int i = 0; i < parts.length; i++) {
       Expression part = parts[i];
       if (part is StringConcatenation) {
         if (expressions == null) {
           expressions = parts.sublist(0, i);
@@ skipping 1862 matching lines @@
   } else if (node is TypeDeclarationBuilder) {
     return node.name;
   } else if (node is PrefixBuilder) {
     return node.name;
   } else if (node is ThisPropertyAccessor) {
     return node.name.name;
   } else {
     return internalError("Unhandled: ${node.runtimeType}");
   }
 }