Revert "Removes dartc reliance on its own libraries, now can be targeted at any implementation's li…

compiler/lib/implementation/math_natives.dart

Index: compiler/lib/implementation/math_natives.dart
diff --git a/compiler/lib/implementation/math_natives.dart b/compiler/lib/implementation/math_natives.dart
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index 0000000000000000000000000000000000000000..860ca2b121ac12a06270e4d79f47057292abc8db
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+++ b/compiler/lib/implementation/math_natives.dart
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+// Copyright (c) 2011, 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.
+
+// Dart core library.
+
+class MathNatives {
+  static double cos(num d) native;
+  static double sin(num d) native;
+  static double tan(num d) native;
+  static double acos(num d) native;
+  static double asin(num d) native;
+  static double atan(num d) native;
+  static double atan2(num a, num b) native;
+  static double sqrt(num d) native;
+  static double exp(num d) native;
+  static double log(num d) native;
+  static double pow(num d1, num d2) native;
+  static double random() native;
+  static int parseInt(String str) native;
+  static double parseDouble(String str) native;
+
+  static BadNumberFormatException _newBadNumberFormat(x) native {
+    return new BadNumberFormatException(x);
+  }
+}