web/chart: fix sample (#909)

web/charts/lib/i18n/rtl_series_legend.dart

@@ -24,11 +24,12 @@ class RTLSeriesLegend extends StatelessWidget {
   final List<charts.Series> seriesList;
   final bool animate;
 
-  RTLSeriesLegend(this.seriesList, {this.animate});
+  const RTLSeriesLegend(this.seriesList, {this.animate, Key key})
+      : super(key: key);
 
   /// Creates a [BarChart] with sample data and no transition.
   factory RTLSeriesLegend.withSampleData() {
-    return new RTLSeriesLegend(
+    return RTLSeriesLegend(
       _createSampleData(),
       // Disable animations for image tests.
       animate: false,
@@ -40,61 +41,61 @@ class RTLSeriesLegend extends StatelessWidget {
   // It is used for creating random series data to demonstrate animation in
   // the example app only.
   factory RTLSeriesLegend.withRandomData() {
-    return new RTLSeriesLegend(_createRandomData());
+    return RTLSeriesLegend(_createRandomData());
   }
 
   /// Create random data.
   static List<charts.Series<OrdinalSales, String>> _createRandomData() {
-    final random = new Random();
+    final random = Random();
 
     final desktopSalesData = [
-      new OrdinalSales('2014', random.nextInt(100)),
-      new OrdinalSales('2015', random.nextInt(100)),
-      new OrdinalSales('2016', random.nextInt(100)),
-      new OrdinalSales('2017', random.nextInt(100)),
+      OrdinalSales('2014', random.nextInt(100)),
+      OrdinalSales('2015', random.nextInt(100)),
+      OrdinalSales('2016', random.nextInt(100)),
+      OrdinalSales('2017', random.nextInt(100)),
     ];
 
     final tabletSalesData = [
-      new OrdinalSales('2014', random.nextInt(100)),
-      new OrdinalSales('2015', random.nextInt(100)),
-      new OrdinalSales('2016', random.nextInt(100)),
-      new OrdinalSales('2017', random.nextInt(100)),
+      OrdinalSales('2014', random.nextInt(100)),
+      OrdinalSales('2015', random.nextInt(100)),
+      OrdinalSales('2016', random.nextInt(100)),
+      OrdinalSales('2017', random.nextInt(100)),
     ];
 
     final mobileSalesData = [
-      new OrdinalSales('2014', random.nextInt(100)),
-      new OrdinalSales('2015', random.nextInt(100)),
-      new OrdinalSales('2016', random.nextInt(100)),
-      new OrdinalSales('2017', random.nextInt(100)),
+      OrdinalSales('2014', random.nextInt(100)),
+      OrdinalSales('2015', random.nextInt(100)),
+      OrdinalSales('2016', random.nextInt(100)),
+      OrdinalSales('2017', random.nextInt(100)),
     ];
 
     final otherSalesData = [
-      new OrdinalSales('2014', random.nextInt(100)),
-      new OrdinalSales('2015', random.nextInt(100)),
-      new OrdinalSales('2016', random.nextInt(100)),
-      new OrdinalSales('2017', random.nextInt(100)),
+      OrdinalSales('2014', random.nextInt(100)),
+      OrdinalSales('2015', random.nextInt(100)),
+      OrdinalSales('2016', random.nextInt(100)),
+      OrdinalSales('2017', random.nextInt(100)),
     ];
 
     return [
-      new charts.Series<OrdinalSales, String>(
+      charts.Series<OrdinalSales, String>(
         id: 'Desktop',
         domainFn: (OrdinalSales sales, _) => sales.year,
         measureFn: (OrdinalSales sales, _) => sales.sales,
         data: desktopSalesData,
       ),
-      new charts.Series<OrdinalSales, String>(
+      charts.Series<OrdinalSales, String>(
         id: 'Tablet',
         domainFn: (OrdinalSales sales, _) => sales.year,
         measureFn: (OrdinalSales sales, _) => sales.sales,
         data: tabletSalesData,
       ),
-      new charts.Series<OrdinalSales, String>(
+      charts.Series<OrdinalSales, String>(
         id: 'Mobile',
         domainFn: (OrdinalSales sales, _) => sales.year,
         measureFn: (OrdinalSales sales, _) => sales.sales,
         data: mobileSalesData,
       ),
-      new charts.Series<OrdinalSales, String>(
+      charts.Series<OrdinalSales, String>(
         id: 'Other',
         domainFn: (OrdinalSales sales, _) => sales.year,
         measureFn: (OrdinalSales sales, _) => sales.sales,
@@ -126,13 +127,13 @@ class RTLSeriesLegend extends StatelessWidget {
     // The below example changes the position to 'start' and max rows of 2 in
     // order to show these effects, but are not required for SeriesLegend to
     // work with the correct directionality.
-    return new Directionality(
+    return Directionality(
         textDirection: TextDirection.rtl,
-        child: new charts.BarChart(
+        child: charts.BarChart(
           seriesList,
           animate: animate,
           behaviors: [
-            new charts.SeriesLegend(
+            charts.SeriesLegend(
                 position: charts.BehaviorPosition.end, desiredMaxRows: 2)
           ],
         ));
@@ -141,53 +142,53 @@ class RTLSeriesLegend extends StatelessWidget {
   /// Create series list with multiple series
   static List<charts.Series<OrdinalSales, String>> _createSampleData() {
     final desktopSalesData = [
-      new OrdinalSales('2014', 5),
-      new OrdinalSales('2015', 25),
-      new OrdinalSales('2016', 100),
-      new OrdinalSales('2017', 75),
+      OrdinalSales('2014', 5),
+      OrdinalSales('2015', 25),
+      OrdinalSales('2016', 100),
+      OrdinalSales('2017', 75),
     ];
 
     final tabletSalesData = [
-      new OrdinalSales('2014', 25),
-      new OrdinalSales('2015', 50),
-      new OrdinalSales('2016', 10),
-      new OrdinalSales('2017', 20),
+      OrdinalSales('2014', 25),
+      OrdinalSales('2015', 50),
+      OrdinalSales('2016', 10),
+      OrdinalSales('2017', 20),
     ];
 
     final mobileSalesData = [
-      new OrdinalSales('2014', 10),
-      new OrdinalSales('2015', 15),
-      new OrdinalSales('2016', 50),
-      new OrdinalSales('2017', 45),
+      OrdinalSales('2014', 10),
+      OrdinalSales('2015', 15),
+      OrdinalSales('2016', 50),
+      OrdinalSales('2017', 45),
     ];
 
     final otherSalesData = [
-      new OrdinalSales('2014', 20),
-      new OrdinalSales('2015', 35),
-      new OrdinalSales('2016', 15),
-      new OrdinalSales('2017', 10),
+      OrdinalSales('2014', 20),
+      OrdinalSales('2015', 35),
+      OrdinalSales('2016', 15),
+      OrdinalSales('2017', 10),
     ];
 
     return [
-      new charts.Series<OrdinalSales, String>(
+      charts.Series<OrdinalSales, String>(
         id: 'Desktop',
         domainFn: (OrdinalSales sales, _) => sales.year,
         measureFn: (OrdinalSales sales, _) => sales.sales,
         data: desktopSalesData,
       ),
-      new charts.Series<OrdinalSales, String>(
+      charts.Series<OrdinalSales, String>(
         id: 'Tablet',
         domainFn: (OrdinalSales sales, _) => sales.year,
         measureFn: (OrdinalSales sales, _) => sales.sales,
         data: tabletSalesData,
       ),
-      new charts.Series<OrdinalSales, String>(
+      charts.Series<OrdinalSales, String>(
         id: 'Mobile',
         domainFn: (OrdinalSales sales, _) => sales.year,
         measureFn: (OrdinalSales sales, _) => sales.sales,
         data: mobileSalesData,
       ),
-      new charts.Series<OrdinalSales, String>(
+      charts.Series<OrdinalSales, String>(
         id: 'Other',
         domainFn: (OrdinalSales sales, _) => sales.year,
         measureFn: (OrdinalSales sales, _) => sales.sales,