fixes #173, ability to use native JS indexers

lib/src/utils.dart

 // Copyright (c) 2015, 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.
 
 /// Holds a couple utility functions used at various places in the system.
 library dev_compiler.src.utils;
 
 import 'dart:io';
 
 import 'package:path/path.dart' as path;
@@ skipping 339 matching lines @@
 /// For example if we had the ClassDeclaration node for `FontElement`:
 ///
 ///    @JsName('HTMLFontElement')
 ///    @deprecated
 ///    class FontElement { ... }
 ///
 /// We could match `@deprecated` with a test function like:
 ///
 ///    (v) => v.type.name == 'Deprecated' && v.type.element.library.isDartCore
 ///
-DartObjectImpl getAnnotationValue(
-    AnnotatedNode node, bool test(DartObjectImpl value)) {
-  for (var metadata in node.metadata) {
-    ElementAnnotationImpl element = metadata.elementAnnotation;
-    if (element == null) continue;
-
-    var evalResult = element.evaluationResult;
+DartObjectImpl findAnnotation(
+    Element element, bool test(DartObjectImpl value)) {
+  for (var metadata in element.metadata) {
+    var evalResult = metadata.evaluationResult;
     if (evalResult == null) continue;
 
     var value = evalResult.value;
     if (value != null && test(value)) return value;
   }
   return null;
 }
 
 /// Given a constant [value], a [fieldName], and an [expectedType], returns the
 /// value of that field.
@@ skipping 84 matching lines @@
   int lineEnd = endLoc.offset;
   int unitEnd = unit.endToken.end;
   int lineNum = lineInfo.getLocation(lineEnd).lineNumber;
   while (lineEnd < unitEnd &&
       lineInfo.getLocation(++lineEnd).lineNumber == lineNum);
 
   var text = content.substring(start, end);
   var lineText = content.substring(lineStart, lineEnd);
   return new SourceSpanWithContext(startLoc, endLoc, text, lineText);
 }