Couple of backend fixes:

sdk/lib/_internal/compiler/implementation/enqueue.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;
 
 class EnqueueTask extends CompilerTask {
   final ResolutionEnqueuer resolution;
   final CodegenEnqueuer codegen;
 
@@ skipping 635 matching lines @@
     addToWorkList(compiler.isolateHelperLibrary.find(
         const SourceString('_callInIsolate')));
   }
 
   void enableNoSuchMethod(Element element) {
     if (compiler.enabledNoSuchMethod) return;
     if (compiler.backend.isDefaultNoSuchMethodImplementation(element)) return;
 
     Selector selector = compiler.noSuchMethodSelector;
     compiler.enabledNoSuchMethod = true;
-    registerInvocation(selector);
-
-    compiler.createInvocationMirrorElement =
-        compiler.findHelper(Compiler.CREATE_INVOCATION_MIRROR);
-    addToWorkList(compiler.createInvocationMirrorElement);
+    compiler.backend.enableNoSuchMethod(this);
   }
 
   void forEach(f(WorkItem work)) {
     while (!queue.isEmpty) {
       // TODO(johnniwinther): Find an optimal process order for resolution.
       f(queue.removeLast());
     }
   }
 
   /**
@@ skipping 58 matching lines @@
     while(!queue.isEmpty) {
       // TODO(johnniwinther): Find an optimal process order for codegen.
       f(queue.removeLast());
     }
   }
 
   void _logSpecificSummary(log(message)) {
     log('Compiled ${generatedCode.length} methods.');
   }
 }