Create specialized versions of getInterceptor.

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 {
@@ skipping 298 matching lines @@
         name = element.name.slowToString();
       }
     } else if (element.isLibrary()) {
       name = LIBRARY_PREFIX;
     } else {
       name = element.name.slowToString();
     }
     return name;
   }
 
+  String getSpecializedName(Element element, Collection<ClassElement> classes) {
+    StringBuffer buffer = new StringBuffer(getName(element));
+    for (ClassElement cls in classes) {
+      buffer.add(getName(cls));
+    }
+    return buffer.toString();
+  }
+
   String getBailoutName(Element element) {
     String name = bailoutNames[element];
     if (name != null) return name;
     bool global = !element.isInstanceMember();
     String unminifiedName = '${getName(element)}\$bailout';
     if (global) {
       name = getMappedGlobalName(unminifiedName);
     } else {
       name = unminifiedName;
       int i = 0;
@@ skipping 102 matching lines @@
   }
 
   String safeName(String name) {
     if (jsReserved.contains(name) || name.startsWith('\$')) {
       name = "\$$name";
       assert(!jsReserved.contains(name));
     }
     return name;
   }
 }