Make methods in Stopwatch getters and rename to be more consistent.

tools/testing/legpad/legpad.dart

Index: tools/testing/legpad/legpad.dart
diff --git a/tools/testing/legpad/legpad.dart b/tools/testing/legpad/legpad.dart
index e6f0d2affb1a3d189917bdb1a7e27880e8b069c4..0db1ffbabd80c7eb5739603ba1378c53973631fd 100644
--- a/tools/testing/legpad/legpad.dart
+++ b/tools/testing/legpad/legpad.dart
@@ -71,7 +71,7 @@ class Legpad {
     setText("input", readAll(mainFile));
     Stopwatch stopwatch = new Stopwatch()..start();
     runLeg();
-    int elapsedMillis = stopwatch.elapsedInMs();
+    int elapsedMillis = stopwatch.elapsedMilliseconds;
     if (output === null) {
       output = "throw 'dart2js compilation error';\n";
     }