Fix some issues.

Runtime/editor/editor_window.cs

 using Unity.UIWidgets.ui;
 using Unity.UIWidgets.widgets;
 using UnityEditor;
-using UnityEditor.Experimental.UIElements;
 using UnityEngine;
 
 namespace Unity.UIWidgets.editor {
             D.assert(this._surface == null);
             this._surface = this.createSurface();
 
-            this._rasterizer.setup(this._surface, this._antiAliasing);
+            this._rasterizer.setup(this._surface, this.antiAliasing);
             _windowAdapters.Add(this);
             this._alive = true;
         }

Runtime/ui/painting/canvas_impl.cs

         RenderLayer _currentLayer;
         Rect _lastScissor;
         
-        public PictureFlusher(RenderTexture renderTexture, float devicePixelRatio, int antiAliasing, MeshPool meshPool) {
+        public PictureFlusher(RenderTexture renderTexture, float devicePixelRatio, MeshPool meshPool, int antiAliasing) {
             D.assert(renderTexture);
             D.assert(devicePixelRatio > 0);
             D.assert(meshPool != null);
         
         public CommandBufferCanvas(RenderTexture renderTexture, float devicePixelRatio, MeshPool meshPool, int antiAliasing = Window.DefaultAntiAliasing) 
             : base(new PictureRecorder()) {
-            this._flusher = new PictureFlusher(renderTexture, devicePixelRatio, antiAliasing, meshPool);
+            this._flusher = new PictureFlusher(renderTexture, devicePixelRatio, meshPool, antiAliasing);
         }
 
         public override float getDevicePixelRatio() {