Move Rectangle and Point into dart:math.

sdk/lib/math/math.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.
 
 /**
  * Mathematical constants and functions, plus a random number generator.
  */
 library dart.math;
 
+part "jenkins_smi_hash.dart";
+part "point.dart";
 part "random.dart";
+part "rectangle.dart";
 
 /**
  * Base of the natural logarithms.
  *
  * Typically written as "e".
  */
 const double E = 2.718281828459045;
 
 /**
  * Natural logarithm of 10.
@@ skipping 220 matching lines @@
  * Returns NaN if [x] is NaN.
  */
 external double exp(num x);
 
 /**
  * Converts [x] to a double and returns the natural logarithm of the value.
  * Returns negative infinity if [x] is equal to zero.
  * Returns NaN if [x] is NaN or less than zero.
  */
 external double log(num x);