Merge pull request #233 from Unity-Technologies/hdc/fixing-errors-in-the-tutorial-and-some-warnings

Fixing an error and some warnings.

README-ZH.md

 
     namespace UIWidgetsSample
     {
-        public class CountDemo : UIWidgetsPanel
+        public class UIWidgetsExample : UIWidgetsPanel
         {
             protected void OnEnable()
             {

README.md

 
     namespace UIWidgetsSample
     {
-        public class CountDemo : UIWidgetsPanel
+        public class UIWidgetsExample : UIWidgetsPanel
         {
             protected void OnEnable()
             {

com.unity.uiwidgets/Runtime/cupertino/route.cs

         }
 
 
-        public string barrierLabel {
+        public override string barrierLabel {
             get { return null; }
         }
 

com.unity.uiwidgets/Runtime/engine/UIWidgetsPanel.cs

         }
 
 
-        protected void OnEnable() {
+        protected override void OnEnable() {
             if (UIWidgetsDisabled) {
                 enabled = false;
                 return;

com.unity.uiwidgets/Runtime/material/slider.cs

 using uiwidgets;
 using Unity.UIWidgets.animation;
 using Unity.UIWidgets.async;
-using Unity.UIWidgets.async;
 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.gestures;
 using Unity.UIWidgets.painting;

com.unity.uiwidgets/Runtime/material/tooltip.cs

 using uiwidgets;
 using Unity.UIWidgets.animation;
 using Unity.UIWidgets.async;
-using Unity.UIWidgets.async;
 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.gestures;
 using Unity.UIWidgets.painting;

com.unity.uiwidgets/Runtime/scheduler/binding.cs

 using System.Text;
 using developer;
 using Unity.UIWidgets.async;
-using Unity.UIWidgets.async;
 using Unity.UIWidgets.engine;
 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.painting;