Let operator* in Duration accept doubles.

tests/corelib/duration_big_num_test.dart

Index: tests/corelib/duration_big_num_test.dart
diff --git a/tests/language/call_this_test.dart b/tests/corelib/duration_big_num_test.dart
similarity index 54%
copy from tests/language/call_this_test.dart
copy to tests/corelib/duration_big_num_test.dart
index 55e7ccd509607ff939e45c328a23ddc0ab023023..46eb32abde21257063471ebc9ea6dd00dbcd3628 100644
--- a/tests/language/call_this_test.dart
+++ b/tests/corelib/duration_big_num_test.dart
@@ -2,17 +2,16 @@
 // 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.
 
-// Test that dart2js treats [:this():] as a closure send.
-
 import "package:expect/expect.dart";
-
-class A {
-  call() => 42;
-  test1() => this();
-  test2() => (this)();
-}
+import 'dart:math';
 
 main() {
-  Expect.equals(42, (new A()).test1());
-  Expect.equals(42, (new A()).test2());
+  Duration d, d1;
+
+  d1 = new Duration(microseconds: pow(2,53));

[floitsch, 2013/06/25 15:28:02]

space between , and 53: pow(2, 53)

[zarah, 2013/06/25 15:54:05]

Done.

+  d = d1 * 2;
+  Expect.equals(pow(2,54), d.inMicroseconds);

[floitsch, 2013/06/25 15:28:02]

ditto.

[zarah, 2013/06/25 15:54:05]

Done.

+  d = d1 * 1.5;
+  Expect.equals(pow(2,53).toDouble() * 1.5, d.inMicroseconds);

[floitsch, 2013/06/25 15:28:02]

ditto.

[zarah, 2013/06/25 15:54:05]

Done.

 }

[floitsch, 2013/06/25 15:28:02]

Add line testing that inMicroseconds still is an integer.
Expect.isTrue(d.inMicroseconds is int);

Also test, that we actually go through the "toDouble":

// Test that we lose precision when multiplying with a double.
d = new Duration(microseconds: pow(2, 53) + 1) * 1.0;
Expect.equals(0, d.inMicroseconds % 2);

[zarah, 2013/06/25 15:54:05]

Done.

+