Remove int.pow and double.pow from VM library.

runtime/lib/double.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.
 
 class _Double implements double {
   factory _Double.fromInteger(int value)
       native "Double_doubleFromInteger";
   int get hashCode {
     if (isNaN || isInfinite) return 0;
     return toInt();
@@ skipping 108 matching lines @@
     }
     if (lowerLimit.isNaN) return lowerLimit;
     if (this.compareTo(lowerLimit) < 0) return lowerLimit;
     if (this.compareTo(upperLimit) > 0) return upperLimit;
     return this;
   }
 
   int toInt() native "Double_toInt";
   double toDouble() { return this; }
 
-  double pow(num exponent) {
-    if (exponent == 0) {
-      return 1.0;  // ECMA-262 15.8.2.13
-    }
-    if (exponent is! num) {
-      throw new ArgumentError(null);
-    }
-    double doubleExponent = exponent.toDouble();
-    if (isNaN || exponent.isNaN) {
-      return double.NAN;
-    }
-    return _pow(doubleExponent);
-  }
-  double _pow(double exponent) native "Double_pow";
-
   String toStringAsFixed(int fractionDigits) {
     // See ECMAScript-262, 15.7.4.5 for details.
 
     if (fractionDigits is! int) {
       throw new ArgumentError(fractionDigits);
     }
     // Step 2.
     if (fractionDigits < 0 || fractionDigits > 20) {
       throw new RangeError(fractionDigits);
     }
@@ skipping 87 matching lines @@
         return EQUAL;
       }
     } else if (isNaN) {
       return other.isNaN ? EQUAL : GREATER;
     } else {
       // Other is NaN.
       return LESS;
     }
   }
 }