cleans up sdk patching so we no longer have unresolved names

test/generated_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";
+import 'dart:_foreign_helper' show JS;
+import 'dart:_js_helper' show patch, checkNum;
 
 /**
  * Base of the natural logarithms.
  *
  * Typically written as "e".
  */
 const double E = 2.718281828459045;
 
 /**
  * Natural logarithm of 10.
@@ skipping 408 matching lines @@
     _nextState();
     int bits27 = _lo & ((1 << 27) - 1);
     return (bits26 * _POW2_27_D + bits27) / _POW2_53_D;
   }
 
   bool nextBool() {
     _nextState();
     return (_lo & 1) == 0;
   }
 }