Don't generate forwarding hooks if all noSuchMethod implementations

pkg/compiler/lib/src/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 343 matching lines @@
   void registerBoundClosure(Enqueuer enqueuer) {}
 
   /// Call this to register that a static function has been closurized.
   void registerGetOfStaticFunction(Enqueuer enqueuer) {}
 
   /**
    * Call this to register that the [:runtimeType:] property has been accessed.
    */
   void registerRuntimeType(Enqueuer enqueuer, Registry registry) {}
 
-  /**
-   * Call this method to enable [noSuchMethod] handling in the
-   * backend.
-   */
-  void enableNoSuchMethod(Element context, Enqueuer enqueuer) {
-    enqueuer.registerInvocation(compiler.noSuchMethodSelector);
-  }
+  /// Call this to register a `noSuchMethod` implementation.
+  void registerNoSuchMethod(Element noSuchMethodElement) {}
+
+  /// Call this method to enable support for `noSuchMethod`.
+  void enableNoSuchMethod(Enqueuer enqueuer) {}
+
+  /// Returns whether or not `noSuchMethod` support has been enabled.
+  bool get enabledNoSuchMethod => false;
 
   /// Call this method to enable support for isolates.
   void enableIsolateSupport(Enqueuer enqueuer) {}
 
   void registerRequiredType(DartType type, Element enclosingElement) {}
   void registerClassUsingVariableExpression(ClassElement cls) {}
 
   void registerConstSymbol(String name, Registry registry) {}
   void registerNewSymbol(Registry registry) {}
 
@@ skipping 561 matching lines @@
       new Selector.getter('iterator', null);
   final Selector currentSelector =
       new Selector.getter('current', null);
   final Selector moveNextSelector =
       new Selector.call('moveNext', null, 0);
   final Selector noSuchMethodSelector = new Selector.call(
       Compiler.NO_SUCH_METHOD, null, Compiler.NO_SUCH_METHOD_ARG_COUNT);
   final Selector symbolValidatedConstructorSelector = new Selector.call(
       'validated', null, 1);
 
-  bool enabledNoSuchMethod = false;
   bool enabledRuntimeType = false;
   bool enabledFunctionApply = false;
   bool enabledInvokeOn = false;
   bool hasIsolateSupport = false;
 
   Stopwatch progress;
 
   bool get shouldPrintProgress {
     return verbose && progress.elapsedMilliseconds > 500;
   }
@@ skipping 653 matching lines @@
     typesTask.onResolutionComplete(mainFunction);
 
     if (stopAfterTypeInference) return;
 
     log('Compiling...');
     phase = PHASE_COMPILING;
     // TODO(johnniwinther): Move these to [CodegenEnqueuer].
     if (hasIsolateSupport) {
       backend.enableIsolateSupport(enqueuer.codegen);
     }
-    if (enabledNoSuchMethod) {
-      backend.enableNoSuchMethod(null, enqueuer.codegen);
-    }
     if (compileAll) {
       libraryLoader.libraries.forEach((LibraryElement library) {
         fullyEnqueueLibrary(library, enqueuer.codegen);
       });
     }
     processQueue(enqueuer.codegen, mainFunction);
     enqueuer.codegen.logSummary(log);
 
     int programSize = backend.assembleProgram();
 
@@ skipping 778 matching lines @@
     return futureClass.computeType(compiler).createInstantiation([elementType]);
   }
 
   @override
   InterfaceType streamType([DartType elementType = const DynamicType()]) {
     return streamClass.computeType(compiler).createInstantiation([elementType]);
   }
 }
 
 typedef void InternalErrorFunction(Spannable location, String message);