Simplify index computation in reflectionDataParser.

pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart

Index: pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
index b7e9c282b9a70b9dae7dfdf75ba7d4832be86905..639b5fa6ab1d5ea6703d0fc7977f17e7e9aebc2e 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
@@ -209,10 +209,11 @@ jsAst.Expression getReflectionDataParser(OldEmitter oldEmitter,
         functions.push(f.\$stubName);
       }
     }
+    index++;
     for (var i = 0; i < funcs.length; index++, i++) {
-      funcs[i].\$callName = ${readString("array", "index + 1")};
+      funcs[i].\$callName = ${readString("array", "index")};
     }
-    var getterStubName = ${readString("array", "++index")};
+    var getterStubName = ${readString("array", "index")};
     array = array.slice(++index);
     var requiredParameterInfo = ${readInt("array", "0")};
     var requiredParameterCount = requiredParameterInfo >> 1;