Simplify index computation in reflectionDataParser.

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

 // Copyright (c) 2013, 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.
 
 part of dart2js.js_emitter;
 
 // TODO(ahe): Share these with js_helper.dart.
 const FUNCTION_INDEX = 0;
 const NAME_INDEX = 1;
 const CALL_NAME_INDEX = 2;
@@ skipping 191 matching lines @@
     for (; index < array.length; index += 2) {
       f = array[index + 1];
       if (typeof f != "function") break;
       f.\$stubName = ${readString("array", "index + 2")};
       funcs.push(f);
       if (f.\$stubName) {
         originalDescriptor[f.\$stubName] = descriptor[f.\$stubName] = f;
         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;
     var isAccessor = (requiredParameterInfo & 1) === 1;
     var isSetter = requiredParameterInfo === 3;
     var isGetter = requiredParameterInfo === 1;
     var optionalParameterInfo = ${readInt("array", "1")};
     var optionalParameterCount = optionalParameterInfo >> 1;
     var optionalParametersAreNamed = (optionalParameterInfo & 1) === 1;
     var isIntercepted =
@@ skipping 258 matching lines @@
 (function() {
   var result = $array[$index];
   if ($check) {
     throw new Error(
         name + ": expected value of type \'$type\' at index " + ($index) +
         " but got " + (typeof result));
   }
   return result;
 })()''';
 }