Use entities in native_emitter.dart

pkg/compiler/lib/src/js_backend/namer.dart

 // Copyright (c) 2011, 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 js_backend.namer;
 
 import 'dart:collection' show HashMap;
 
 import 'package:js_runtime/shared/embedded_names.dart' show JsGetName;
 
@@ skipping 758 matching lines @@
         ? 'self'
         : backend.nativeData.getUnescapedJSInteropName(e.name);
   }
 
   /// Returns a JavaScript path specifying the context in which
   /// [element.fixedBackendName] should be evaluated. Only applicable for
   /// elements using typed JavaScript interop.
   /// For example: fixedBackendPath for the static method createMap in the
   /// Map class of the goog.map JavaScript library would have path
   /// "goog.maps.Map".
-  String fixedBackendPath(Element element) {
+  String fixedBackendMethodPath(MethodElement element) {
+    return _fixedBackendPath(element);
+  }
+
+  String _fixedBackendPath(Element element) {
     if (!backend.isJsInterop(element)) return null;
     if (element.isInstanceMember) return 'this';
-    if (element.isConstructor) return fixedBackendPath(element.enclosingClass);
+    if (element.isConstructor) return _fixedBackendPath(element.enclosingClass);
     if (element.isLibrary) return 'self';
     var sb = new StringBuffer();
     sb..write(_jsNameHelper(element.library));
 
     if (element.enclosingClass != null && element.enclosingClass != element) {
       sb..write('.')..write(_jsNameHelper(element.enclosingClass));
     }
     return sb.toString();
   }
 
@@ skipping 1405 matching lines @@
   void addSuggestion(String original, String suggestion) {
     assert(!_suggestedNames.containsKey(original));
     _suggestedNames[original] = suggestion;
   }
 
   bool hasSuggestion(String original) => _suggestedNames.containsKey(original);
   bool isSuggestion(String candidate) {
     return _suggestedNames.containsValue(candidate);
   }
 }