Update fixnum to new package guidelines.

pkg/fixnum/test/int_64_vm_test.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.
 
 // A test to compare the results of the fixnum library with the Dart VM
 
 library int64vmtest;
-import 'dart:math', prefix: 'Math';
-part '../intx.dart';
-part '../int32.dart';
-part '../int64.dart';
+import 'dart:math' as math;
+
+part '../lib/src/int32.dart';
+part '../lib/src/int64.dart';
+part '../lib/src/intx.dart';
+
+final random = new math.Random();
 
 void main() {
   int64VMTest test = new int64VMTest();
   test.doTestBinary(new BinaryOp("&", (a, b) => a & b));
   test.doTestBinary(new BinaryOp("|", (a, b) => a | b));
   test.doTestBinary(new BinaryOp("^", (a, b) => a ^ b));
   test.doTestBinary(new BinaryOp("+", (a, b) => a + b));
   test.doTestBinary(new BinaryOp("-", (a, b) => a - b));
   test.doTestBinary(new BinaryOp("*", (a, b) => a * b));
   test.doTestUnary(new UnaryOp("-", (a) => -a));
@@ skipping 10 matching lines @@
   test.doTestBinary(new BinaryOp("%", (a, b) => a % b));
   test.doTestBinary(new BinaryOp("~/", (a, b) => a ~/ b));
   test.doTestBinary(new BinaryOp("remainder", (a, b) => a.remainder(b)));
 }
 
 const int DISCARD = 0;
 
 int64 _randomInt64() {
   int i = 0;
   for (int b = 0; b < 64; b++) {
-      double rand = Math.random();
+      double rand = random.nextDouble();
       for (int j = 0; j < DISCARD; j++) {
-        rand = Math.random();
+        rand = random.nextDouble();
       }
       i = (i << 1) | ((rand > 0.5) ? 1 : 0);
   }
   return new int64.fromInt(i);
 }
 
 int _randomInt(int n) {
-  double rand = Math.random();
+  double rand = random.nextDouble();
   for (int i = 0; i < DISCARD; i++) {
-    rand = Math.random();
+    rand = random.nextDouble();
   }
   return (rand * n).floor().toInt();
 }
 
 class Op {
   String name;
   Function op;
 
   Op(String this.name, Function this.op);
 
@@ skipping 28 matching lines @@
 class ShiftOp extends Op {
   ShiftOp(String name, Function op) : super(name, op);
   int ref(int val0, int shift) => trunc64(op(val0, shift));
   int64 test(int64 val0, int shift) => op(val0, shift);
 }
 
 class int64VMTest {
   static const int BASE_VALUES = 32;
   static const int RANDOM_TESTS = 32;
   List<int64> TEST_VALUES;
-  
+
   int64VMTest() {
     Set<int64> testSet = new Set<int64>();
     for (int i = 0; i < BASE_VALUES; i++) {
       testSet.add(new int64.fromInt(i));
       testSet.add(new int64.fromInt(-i));
 
       testSet.add(int64.MIN_VALUE + i);
       testSet.add(int64.MAX_VALUE - i);
 
       testSet.add(new int64.fromInt(i << int64._BITS ~/ 2));
@@ skipping 154 matching lines @@
     }
   }
 
   void _doTestBoolean(BooleanOp op, int64 val0, int64 val1) {
     bool ref = op.ref(val0.toInt(), val1.toInt());
     bool result = op.test(val0, val1);
     if (ref != result) {
       Expect.fail("${op.name}: val0 = $val0, val1 = $val1");
     }
   }
-  
+
   void doTestBoolean(BooleanOp op) {
     print("Testing operator ${op.name}");
     for (int i = 0; i < TEST_VALUES.length; i++) {
       int64 randomLong = _randomInt64();
       _doTestBoolean(op, TEST_VALUES[i], randomLong);
       _doTestBoolean(op, randomLong, TEST_VALUES[i]);
       for (int j = 0; j < TEST_VALUES.length; j++) {
         _doTestBoolean(op, TEST_VALUES[i], TEST_VALUES[j]);
       }
     }
@@ skipping 12 matching lines @@
   }
 
   void _doTestShift(ShiftOp op, int64 val, int shift) {
     int ref = op.ref(val.toInt(), shift);
     int64 result64 = op.test(val, shift);
     int result = result64.toInt();
     if (ref != result) {
       Expect.fail("${op.name}: val = $val, shift = $shift");
     }
   }
- 
+
   void doTestShift(ShiftOp op) {
     print("Testing operator ${op.name}");
     for (int i = 0; i < TEST_VALUES.length; i++) {
       for (int shift = -64; shift <= 64; shift++) {
         _doTestShift(op, TEST_VALUES[i], shift);
       }
     }
     for (int i = 0; i < RANDOM_TESTS; i++) {
       int64 randomLong = _randomInt64();
       for (int shift = -64; shift <= 64; shift++) {
         _doTestShift(op, randomLong, shift);
       }
     }
   }
 }