add back in the older usage API
diff --git a/lib/usage_html.dart b/lib/usage_html.dart
new file mode 100644
index 0000000..f3dd555
--- /dev/null
+++ b/lib/usage_html.dart
@@ -0,0 +1,45 @@
+// Copyright (c) 2014, 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.
+
+/**
+ * In order to use this library import the `usage_html.dart` file and
+ * instantiate the [AnalyticsHtml] class.
+ *
+ * You'll need to provide a Google Analytics tracking ID, the application name,
+ * and the application version.
+ */
+library usage_html;
+
+import 'dart:html';
+
+import 'src/usage_impl.dart';
+import 'src/usage_impl_html.dart';
+
+export 'usage.dart';
+
+/**
+ * An interface to a Google Analytics session, suitable for use in web apps.
+ *
+ * [analyticsUrl] is an optional replacement for the default Google Analytics
+ * URL (`https://www.google-analytics.com/collect`).
+ */
+class AnalyticsHtml extends AnalyticsImpl {
+ AnalyticsHtml(String trackingId, String applicationName, String applicationVersion, {
+ String analyticsUrl
+ }) : super(
+ trackingId,
+ new HtmlPersistentProperties(applicationName),
+ new HtmlPostHandler(),
+ applicationName: applicationName,
+ applicationVersion: applicationVersion,
+ analyticsUrl: analyticsUrl
+ ) {
+ int screenWidth = window.screen.width;
+ int screenHeight = window.screen.height;
+
+ setSessionValue('sr', '${screenWidth}x$screenHeight');
+ setSessionValue('sd', '${window.screen.pixelDepth}-bits');
+ setSessionValue('ul', window.navigator.language);
+ }
+}
