roll dart2js_info to 0.3.0

pkg/compiler/lib/src/dump_info.dart

Index: pkg/compiler/lib/src/dump_info.dart
diff --git a/pkg/compiler/lib/src/dump_info.dart b/pkg/compiler/lib/src/dump_info.dart
index 634d962c6f1c1ed5baa1d7009f3e1f9ab915f074..2a775a16522c4b3022c3ed335f969933b620ea75 100644
--- a/pkg/compiler/lib/src/dump_info.dart
+++ b/pkg/compiler/lib/src/dump_info.dart
@@ -580,8 +580,9 @@ class DumpInfoTask extends CompilerTask implements InfoReporter {
             compiler.options.hasBuildId ? compiler.options.buildId : null,
         compilationMoment: new DateTime.now(),
         compilationDuration: compiler.measurer.wallClock.elapsed,
-        toJsonDuration: stopwatch.elapsedMilliseconds,
-        dumpInfoDuration: this.timing,
+        toJsonDuration:
+            new Duration(milliseconds: stopwatch.elapsedMilliseconds),
+        dumpInfoDuration: new Duration(milliseconds: this.timing),
         noSuchMethodEnabled: compiler.backend.enabledNoSuchMethod,
         minified: compiler.options.enableMinification);