Revert "Split TypedSelector into Selector and TypeMask."

pkg/compiler/lib/src/ssa/codegen_helpers.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 ssa;
 
 /**
  * Replaces some instructions with specialized versions to make codegen easier.
  * Caches codegen information on nodes.
  */
@@ skipping 93 matching lines @@
       //
       // This often reduces the number of references to 'a' to one, allowing 'a'
       // to be generated at use to avoid a temporary, e.g.
       //
       //     t1 = b.get$thing();
       //     t1.foo$1(t1, x)
       // --->
       //     b.get$thing().foo$1(0, x)
       //
       Selector selector = node.selector;
-      TypeMask mask = node.mask;
       if (backend.isInterceptedSelector(selector) &&
-          !backend.isInterceptedMixinSelector(selector, mask)) {
+          !backend.isInterceptedMixinSelector(selector)) {
         HInstruction interceptor = node.inputs[0];
         HInstruction receiverArgument = node.inputs[1];
 
         if (interceptor.nonCheck() == receiverArgument.nonCheck()) {
           // TODO(15933): Make automatically generated property extraction
           // closures work with the dummy receiver optimization.
           if (!selector.isGetter) {
             ConstantValue constant = new SyntheticConstantValue(
                 SyntheticConstantKind.DUMMY_INTERCEPTOR,
                 receiverArgument.instructionType);
@@ skipping 632 matching lines @@
     }
 
     // If [thenInput] is defined in the first predecessor, then it is only used
     // by [phi] and can be generated at use site.
     if (identical(thenInput.block, end.predecessors[0])) {
       assert(thenInput.usedBy.length == 1);
       markAsGenerateAtUseSite(thenInput);
     }
   }
 }