Split TypedSelector into Selector and TypeMask.

pkg/compiler/lib/src/js_backend/backend.dart

Index: pkg/compiler/lib/src/js_backend/backend.dart
diff --git a/pkg/compiler/lib/src/js_backend/backend.dart b/pkg/compiler/lib/src/js_backend/backend.dart
index e037ff376d1b22f1561d66a128f0f6790b83cff1..c40247a7128b026f3812cfc6547894f7caa73762 100644
--- a/pkg/compiler/lib/src/js_backend/backend.dart
+++ b/pkg/compiler/lib/src/js_backend/backend.dart
@@ -784,7 +784,7 @@ class JavaScriptBackend extends Backend {
    * into an intercepted class.  These selectors are not eligible for the 'dummy
    * explicit receiver' optimization.
    */
-  bool isInterceptedMixinSelector(Selector selector) {
+  bool isInterceptedMixinSelector(Selector selector, TypeMask mask) {
     Set<Element> elements = interceptedMixinElements.putIfAbsent(
         selector.name,
         () {
@@ -799,7 +799,10 @@ class JavaScriptBackend extends Backend {
 
     if (elements == null) return false;
     if (elements.isEmpty) return false;
-    return elements.any((element) => selector.applies(element, compiler.world));
+    return elements.any((element) {
+      return selector.applies(element, compiler.world) &&
+             (mask == null || mask.canHit(element, selector, compiler.world));
+    });
   }
 
   final Map<String, Set<ClassElement>> interceptedClassesCache =
@@ -1278,7 +1281,8 @@ class JavaScriptBackend extends Backend {
 
   void enableNoSuchMethod(Enqueuer world) {
     enqueue(world, getCreateInvocationMirror(), compiler.globalDependencies);
-    world.registerInvocation(compiler.noSuchMethodSelector);
+    world.registerInvocation(
+        new UniverseSelector(compiler.noSuchMethodSelector, null));
   }
 
   void enableIsolateSupport(Enqueuer enqueuer) {