Revert "Support unary - operator."

dart/tests/compiler/dart2js/resolver_test.dart

Index: dart/tests/compiler/dart2js/resolver_test.dart
diff --git a/dart/tests/compiler/dart2js/resolver_test.dart b/dart/tests/compiler/dart2js/resolver_test.dart
index df2320ffb2dac6173b5968f0972a0d5abde8ed9b..9f13539ebdb58ea43875bd90ecd2c536f31bd7ee 100644
--- a/dart/tests/compiler/dart2js/resolver_test.dart
+++ b/dart/tests/compiler/dart2js/resolver_test.dart
@@ -749,9 +749,8 @@ testToString() {
   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 = @"""
@@ -762,8 +761,8 @@ testIndexedOperator() {
       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() {
@@ -784,8 +783,8 @@ testIncrementsAndDecrements() {
       }""";
   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('-'));
 }