Replace scalarlist optimizations and split external array loads into two IL instructions.

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:scalarlist";
+import "dart:typeddata";
 
 // A VM patch of the dart:math library.
 patch num pow(num x, num exponent) {
   if (exponent is int) {
     return x.pow(exponent);
   }
   // Double.pow will call exponent.toDouble().
   return x.toDouble().pow(exponent);
 }
 
@@ skipping 96 matching lines @@
 
   static int _nextSeed() {
     if (_prng == null) {
       // TODO(iposva): Use system to get a random seed.
       _prng = new Random(new DateTime.now().millisecondsSinceEpoch);
     }
     // Trigger the PRNG once to change the internal state.
     return _prng._nextInt32();
   }
 }