Revert "Support unary - operator."

dart/tests/compiler/dart2js/resolver_test.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.
 
 #import('dart:uri');
 
 #import("../../../lib/compiler/implementation/leg.dart");
 #import("../../../lib/compiler/implementation/elements/elements.dart");
 #import("../../../lib/compiler/implementation/tree/tree.dart");
 #import("../../../lib/compiler/implementation/scanner/scannerlib.dart");
@@ skipping 731 matching lines @@
       compiler.enqueuer.resolution.getCachedElements(memberElement));
 }
 
 testToString() {
   final script = @"class C { toString() => 'C'; } main() { '${new C()}'; }";
   final compiler = compileScript(script);
 
   checkMemberResolved(compiler, 'C', buildSourceString('toString'));
 }
 
-operatorName(op, isUnary) {
-  return Elements.constructOperatorName(new SourceString(op), isUnary);
-}
+operatorName(op) => Elements.constructOperatorName(
+    const SourceString('operator'), new SourceString(op));
 
 testIndexedOperator() {
   final script = @"""
       class C {
         operator[](ix) => ix;
         operator[]=(ix, v) {}
       }
       main() { var c = new C(); c[0]++; }""";
   final compiler = compileScript(script);
 
-  checkMemberResolved(compiler, 'C', operatorName('[]', false));
-  checkMemberResolved(compiler, 'C', operatorName('[]=', false));
+  checkMemberResolved(compiler, 'C', operatorName('[]'));
+  checkMemberResolved(compiler, 'C', operatorName('[]='));
 }
 
 testIncrementsAndDecrements() {
   final script = @"""
       class A { operator+(o)=>null; }
       class B { operator+(o)=>null; }
       class C { operator-(o)=>null; }
       class D { operator-(o)=>null; }
       main() {
         var a = new A();
         a++;
         var b = new B();
         ++b;
         var c = new C();
         c--;
         var d = new D();
         --d;
       }""";
   final compiler = compileScript(script);
 
-  checkMemberResolved(compiler, 'A', operatorName('+', false));
-  checkMemberResolved(compiler, 'B', operatorName('+', false));
-  checkMemberResolved(compiler, 'C', operatorName('-', false));
-  checkMemberResolved(compiler, 'D', operatorName('-', false));
+  checkMemberResolved(compiler, 'A', operatorName('+'));
+  checkMemberResolved(compiler, 'B', operatorName('+'));
+  checkMemberResolved(compiler, 'C', operatorName('-'));
+  checkMemberResolved(compiler, 'D', operatorName('-'));
 }