Update timer and adjust frequency.

sdk/lib/core/stopwatch.dart

Index: sdk/lib/core/stopwatch.dart
diff --git a/sdk/lib/core/stopwatch.dart b/sdk/lib/core/stopwatch.dart
index 9650a570bc2c32a771f387c788ad5d0f2f0d2677..e923083a7d174b7d6e611bec9562be51f6579684 100644
--- a/sdk/lib/core/stopwatch.dart
+++ b/sdk/lib/core/stopwatch.dart
@@ -11,7 +11,7 @@ class Stopwatch {
   /**
    * Frequency of the elapsed counter in Hz.
    */
-  final int frequency = _frequency();
+  int get frequency => _frequency;

[Lasse Reichstein Nielsen, 2014/06/20 23:29:52]

Perhaps make this one external, so you don't need a frequency field on each
StopWatch object that all contain the same value as Primitives.tickerFrequency.

[floitsch, 2014/06/23 08:54:26]

_frequency is a static field.

 
   // The _start and _stop fields capture the time when [start] and [stop]
   // are called respectively.
@@ -29,7 +29,9 @@ class Stopwatch {
    *
    *     Stopwatch stopwatch = new Stopwatch()..start();
    */
-  Stopwatch();
+  Stopwatch() {
+    _initTicker();
+  }
 
   /**
    * Starts the [Stopwatch].
@@ -127,6 +129,15 @@ class Stopwatch {
    */
   bool get isRunning => _start != null && _stop == null;
 
-  external static int _frequency();
+  /**
+   * Cached frequency of the system. Must be initialized in [_initTicker];
+   */
+  static int _frequency;
+
+  /**
+   * Initializes the time-measuring system. *Must* initialize the [_frequency]
+   * variable.
+   */
+  external static void _initTicker();
   external static int _now();
 }