Couple of backend fixes:

sdk/lib/_internal/compiler/implementation/compiler.dart

 // Copyright (c) 2012, 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 dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 193 matching lines @@
    * instantiated generic class.
    */
   void registerGenericClosure(Element closure,
                               Enqueuer enqueuer,
                               TreeElements elements) {}
   /**
    * Call this to register that the [:runtimeType:] property has been accessed.
    */
   void registerRuntimeType(Enqueuer enqueuer, TreeElements elements) {}
 
+  /**
+   * Call this method to enable [noSuchMethod] handling in the
+   * backend.
+   */
+  void enableNoSuchMethod(Enqueuer enqueuer) {}
+
   void registerRequiredType(DartType type, Element enclosingElement) {}
   void registerClassUsingVariableExpression(ClassElement cls) {}
 
   void registerConstSymbol(String name, TreeElements elements) {}
   void registerNewSymbol(TreeElements elements) {}
 
   bool isNullImplementation(ClassElement cls) {
     return cls == compiler.nullClass;
   }
   ClassElement get intImplementation => compiler.intClass;
@@ skipping 219 matching lines @@
   // Initialized when dart:mirrors is loaded.
   ClassElement deferredLibraryClass;
 
   ClassElement jsInvocationMirrorClass;
   /// Document class from dart:mirrors.
   ClassElement documentClass;
   Element assertMethod;
   Element identicalFunction;
   Element functionApplyMethod;
   Element invokeOnMethod;
-  Element createInvocationMirrorElement;
 
   Element get currentElement => _currentElement;
 
   /**
    * Perform an operation, [f], returning the return value from [f].  If an
    * error occurs then report it as having occurred during compilation of
    * [element].  Can be nested.
    */
   withCurrentElement(Element element, f()) {
     Element old = currentElement;
@@ skipping 565 matching lines @@
 
     log('Compiling...');
     phase = PHASE_COMPILING;
     // TODO(johnniwinther): Move these to [CodegenEnqueuer].
     if (hasIsolateSupport()) {
       enqueuer.codegen.addToWorkList(
           isolateHelperLibrary.find(Compiler.START_ROOT_ISOLATE));
       enqueuer.codegen.registerGetOfStaticFunction(mainApp.find(MAIN));
     }
     if (enabledNoSuchMethod) {
-      enqueuer.codegen.registerInvocation(noSuchMethodSelector);
-      enqueuer.codegen.addToWorkList(createInvocationMirrorElement);
+      backend.enableNoSuchMethod(enqueuer.codegen);
     }
     if (compileAll) {
       libraries.forEach((_, lib) => fullyEnqueueLibrary(lib, enqueuer.codegen));
     }
     processQueue(enqueuer.codegen, main);
     enqueuer.codegen.logSummary(log);
 
     if (compilationFailed) return;
 
     backend.assembleProgram();
@@ skipping 484 matching lines @@
 
   void close() {}
 
   toString() => name;
 
   /// Convenience method for getting an [api.CompilerOutputProvider].
   static NullSink outputProvider(String name, String extension) {
     return new NullSink('$name.$extension');
   }
 }