Unbreak closure invocation name minification.

sdk/lib/_internal/compiler/implementation/universe/universe.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.
 
 library universe;
 
 import '../closure.dart';
 import '../elements/elements.dart';
 import '../dart2jslib.dart';
 import '../tree/tree.dart';
@@ skipping 208 matching lines @@
   bool isIndex() => identical(kind, SelectorKind.INDEX) && argumentCount == 1;
   bool isIndexSet() => identical(kind, SelectorKind.INDEX) && argumentCount == 2;
 
   bool isOperator() => identical(kind, SelectorKind.OPERATOR);
   bool isUnaryOperator() => isOperator() && argumentCount == 0;
   bool isBinaryOperator() => isOperator() && argumentCount == 1;
 
   /** Check whether this is a call to 'assert'. */
   bool isAssert() => isCall() && identical(name.stringValue, "assert");
 
-  /** Check whether this is a closure invocation call. */
-  bool isClosureCall() =>
-      isCall() && identical(name.stringValue, Compiler.CALL_OPERATOR_NAME);
-
   int get hashCode => argumentCount + 1000 * namedArguments.length;
   int get namedArgumentCount => namedArguments.length;
   int get positionalArgumentCount => argumentCount - namedArgumentCount;
   DartType get receiverType => null;
 
   /**
    * The member name for invocation mirrors created from this selector.
    */
   String get invocationMirrorMemberName =>
       isSetter() ? '${name.slowToString()}=' : name.slowToString();
@@ skipping 236 matching lines @@
     ClassElement cls = self;
     if (cls.isSubclassOf(other)) {
       // Resolve an invocation of [element.name] on [self]. If it
       // is found, this selector is a candidate.
       return hasElementIn(self, element) && appliesUntyped(element, compiler);
     }
 
     return false;
   }
 }