Revert "Support unary - operator."

dart/pkg/dartdoc/mirrors/dart2js_mirror.dart

Index: dart/pkg/dartdoc/mirrors/dart2js_mirror.dart
diff --git a/dart/pkg/dartdoc/mirrors/dart2js_mirror.dart b/dart/pkg/dartdoc/mirrors/dart2js_mirror.dart
index b7a7d6c7c577ae2d2a3366484a7648a34e148dfa..444a0e16212aa97b4c8f5bb7768c30b430f42bf5 100644
--- a/dart/pkg/dartdoc/mirrors/dart2js_mirror.dart
+++ b/dart/pkg/dartdoc/mirrors/dart2js_mirror.dart
@@ -125,6 +125,7 @@ String _getOperatorFromOperatorName(String name) {
   Map<String, String> mapping = const {
     'eq': '==',
     'not': '~',
+    'negate': 'negate', // Will change.
     'index': '[]',
     'indexSet': '[]=',
     'mul': '*',
@@ -1243,12 +1244,6 @@ class Dart2JsMethodMirror extends Dart2JsElementMirror
         _kind = Dart2JsMethodKind.FACTORY;
         // canonical name is TypeName.constructorName
         _canonicalName = '$_name.$_constructorName';
-      } else if (_name == 'negate') {
-        _operatorName = _name;
-        _name = 'operator';
-        _kind = Dart2JsMethodKind.OPERATOR;
-        // canonical name is 'operator operatorName'
-        _canonicalName = 'operator $_operatorName';
       } else if (_name.startsWith('operator\$')) {
         String str = _name.substring(9);
         _name = 'operator';