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

compiler/lib/clock.dart

Index: compiler/lib/clock.dart
diff --git a/compiler/lib/clock.dart b/compiler/lib/clock.dart
new file mode 100644
index 0000000000000000000000000000000000000000..ff75d1d03e0944c91981d7939cb77e91fc0b5ae0
--- /dev/null
+++ b/compiler/lib/clock.dart
@@ -0,0 +1,25 @@
+// 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.
+
+/**
+ * The class [Clock] provides access to a monotonically incrementing clock
+ * device.
+ */
+class Clock {
+
+  /**
+   * Returns the current clock tick.
+   */
+  static int now() {
+    return new Date.now().value;
+  }
+
+  /**
+   * Returns the frequency of clock ticks in Hz.
+   */
+  static int frequency() {
+    return 1000;
+  }
+
+}