Don't hide interceptors in mirrors.

sdk/lib/_internal/compiler/implementation/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.
 
 part of js_backend;
 
 /**
  * Assigns JavaScript identifiers to Dart variables, class-names and members.
  */
 class Namer implements ClosureNamer {
@@ skipping 708 matching lines @@
       return getMappedGlobalName(root, ensureSafe: false);
     } else {
       String suffix = getInterceptorSuffix(classes);
       return getMappedGlobalName("$root\$$suffix", ensureSafe: false);
     }
   }
 
   /// Returns the runtime name for [element].  The result is not safe as an id.
   String getRuntimeTypeName(Element element) {
     if (identical(element, compiler.dynamicClass)) return 'dynamic';
-    JavaScriptBackend backend = compiler.backend;
-    element = backend.getImplementationClass(element);
-    String name = getPrimitiveInterceptorRuntimeName(element);
-    // TODO(ahe): Creating a string here is unfortunate. It is slow (due to
-    // string concatenation in the implementation), and may prevent
-    // segmentation of '$'.
-    return name != null ? name : getNameForRti(element);
+    return getNameForRti(element);
   }
 
   /**
-   * Return a string to be used as the runtime name of this class (instead of
-   * the class name) or [:null:] if the class name should be used.
-   */
-  String getPrimitiveInterceptorRuntimeName(Element cls) {
-    JavaScriptBackend backend = compiler.backend;
-    if (cls == backend.jsIntClass) {
-      return 'int';
-    } else if (cls == backend.jsNumberClass) {
-      return 'num';
-    } else if (cls == backend.jsBoolClass) {
-      return 'bool';
-    } else if (cls == backend.jsDoubleClass) {
-      return 'double';
-    } else if (cls == backend.jsStringClass) {
-      return 'String';
-    } else if (cls == backend.jsArrayClass) {
-      return 'List';
-    } else if (cls == backend.jsNullClass) {
-      return 'Null';
-    } else {
-      return null;
-    }
-  }
-
-  /**
    * Returns a preferred JS-id for the given element. The returned id is
    * guaranteed to be a valid JS-id. Globals and static fields are furthermore
    * guaranteed to be unique.
    *
    * For accessing statics consider calling
    * [isolateAccess] or [isolatePropertyAccess] instead.
    */
   // TODO(ahe): This is an internal method to the Namer (and its subclasses)
   // and should not be call from outside.
   String getNameX(Element element) {
@@ skipping 631 matching lines @@
         if (!first) {
           sb.write('_');
         }
         sb.write('_');
         visit(link.head);
         first = true;
       }
     }
   }
 }