Fix various nits in VM patch files.

runtime/lib/math_patch.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:typed_data";
 
 // A VM patch of the dart:math library.
 
 // If [x] is an [int] and [exponent] is a non-negative [int], the result is
 // an [int], otherwise the result is a [double].
@@ skipping 81 matching lines @@
   }
 
   @patch factory Random.secure() {
     return new _SecureRandom();
   }
 }
 
 
 class _Random implements Random {
   // Internal state of the random number generator.
-  final _state;
+  final Uint32List _state;
   static const _kSTATE_LO = 0;
   static const _kSTATE_HI = 1;  // Unused in Dart code.
 
-  _Random._withState(Uint32List this._state);
+  _Random._withState(this._state);
 
   // The algorithm used here is Multiply with Carry (MWC) with a Base b = 2^32.
   // http://en.wikipedia.org/wiki/Multiply-with-carry
   // The constant A is selected from "Numerical Recipes 3rd Edition" p.348 B1.
 
   // Implements:
   //   var state =
   //       ((_A * (_state[_kSTATE_LO])) + _state[_kSTATE_HI]) & ((1 << 64) - 1);
   //   _state[_kSTATE_LO] = state & ((1 << 32) - 1);
   //   _state[_kSTATE_HI] = state >> 32;
@@ skipping 88 matching lines @@
 
   bool nextBool() {
     return _getBytes(1).isEven;
   }
 
   // Constants used by the algorithm.
   static const _POW2_32 = 1 << 32;
   static const _POW2_53_D = 1.0 * (1 << 53);
 }