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

compiler/lib/implementation/number.dart

-// 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.
-
-class NumberImplementation implements int, double native "Number" {
-
-  NumberImplementation operator +(NumberImplementation other) native;
-  NumberImplementation operator -(NumberImplementation other) native;
-  NumberImplementation operator *(NumberImplementation other) native;
-  NumberImplementation operator /(NumberImplementation other) native;
-  NumberImplementation operator ~/(NumberImplementation other) native;
-  NumberImplementation operator %(NumberImplementation shiftAmount) native;
-  NumberImplementation operator negate() native;
-
-  int operator |(int other) native;
-  int operator &(int other) native;
-  int operator ^(int other) native;
-  int operator <<(int shiftAmount) native;
-  int operator >>(int shiftAmount) native;
-  int operator ~() native;
-
-  bool operator ==(NumberImplementation other) native;
-  bool operator <(NumberImplementation other) native;
-  bool operator <=(NumberImplementation other) native;
-  bool operator >(NumberImplementation other) native;
-  bool operator >=(NumberImplementation other) native;
-
-  NumberImplementation remainder(num other) native;
-  NumberImplementation abs() native;
-  NumberImplementation round() native;
-  NumberImplementation floor() native;
-  NumberImplementation ceil() native;
-  NumberImplementation truncate() native;
-
-  // CompareTo has to give a complete order, including -0/+0, NaN and
-  // Infinities.
-  // Order is: -Inf < .. < -0.0 < 0.0 .. < +inf < NaN.
-  NumberImplementation compareTo(NumberImplementation other) {
-    // Don't use the 'this' object (which is a JS Number object), but get the
-    // primitive JS number by invoking toDouble().
-    num thisValue = toDouble();
-    // Remember that NaN return false for any comparison.
-    if (thisValue < other) {
-      return -1;
-    } else if (thisValue > other) {
-      return 1;
-    } else if (thisValue == other) {
-      if (thisValue == 0) {
-        bool thisIsNegative = isNegative();
-        bool otherIsNegative = other.isNegative();
-        if (thisIsNegative == otherIsNegative) return 0;
-        if (thisIsNegative) return -1;
-        return 1;
-      }
-      return 0;
-    } else if (isNaN()) {
-      if (other.isNaN()) {
-        return 0;
-      }
-      return 1;
-    } else {
-      return -1;
-    }
-  }
-
-  bool isNegative() native;
-  bool isEven() native;
-  bool isOdd() native;
-  bool isNaN() native;
-  bool isInfinite() native;
-
-  int toInt() {
-    if (isNaN()) throw new BadNumberFormatException("NaN");
-    if (isInfinite()) throw new BadNumberFormatException("Infinity");
-    NumberImplementation truncated = truncate();
-    // If truncated is -0.0 return +0. The test will also trigger for positive
-    // 0s but that's not a problem.
-    if (truncated == -0.0) return 0;
-    return truncated;
-  }
-
-  NumberImplementation toDouble() native;
-  String toString() native;
-  String toStringAsFixed(int fractionDigits) native;
-  String toStringAsExponential(int fractionDigits) native;
-  String toStringAsPrecision(int precision) native;
-  String toRadixString(int radix) native;
-
-  int hashCode() native;
-  get dynamic() { return toDouble(); }
-}
-
-class _NumberJsUtil {
-  static void _throwIllegalArgumentException(var argument) native {
-    throw new IllegalArgumentException([argument]);
-  }
-}