Don't need to pass visual brush renderer when creating render target.

src/Avalonia.Controls/TopLevel.cs

@@ -189,7 +189,7 @@ namespace Avalonia.Controls
         }
 
         /// <inheritdoc/>
-        IRenderTarget IRenderRoot.CreateRenderTarget(IVisualBrushRenderer visualBrushRenderer)
+        IRenderTarget IRenderRoot.CreateRenderTarget()
         {
             return _renderInterface.CreateRenderTarget(PlatformImpl.Surfaces);
         }

src/Avalonia.Visuals/Rendering/DeferredRenderer.cs

@@ -242,7 +242,7 @@ namespace Avalonia.Rendering
             {
                 if (_renderTarget == null)
                 {
-                    _renderTarget = ((IRenderRoot)_root).CreateRenderTarget(this);
+                    _renderTarget = ((IRenderRoot)_root).CreateRenderTarget();
                 }
 
                 using (var context = _renderTarget.CreateDrawingContext(this))

src/Avalonia.Visuals/Rendering/IRenderRoot.cs

@@ -28,7 +28,7 @@ namespace Avalonia.Rendering
         /// Creates a render target for the window.
         /// </summary>
         /// <returns>An <see cref="IRenderTarget"/>.</returns>
-        IRenderTarget CreateRenderTarget(IVisualBrushRenderer visualBrushRenderer);
+        IRenderTarget CreateRenderTarget();
 
         /// <summary>
         /// Adds a rectangle to the window's dirty region.

src/Avalonia.Visuals/Rendering/ImmediateRenderer.cs

@@ -48,7 +48,7 @@ namespace Avalonia.Rendering
         {
             if (_renderTarget == null)
             {
-                _renderTarget = ((IRenderRoot)_root).CreateRenderTarget(this);
+                _renderTarget = ((IRenderRoot)_root).CreateRenderTarget();
             }
 
             try

tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests_Virtualization.cs

@@ -319,7 +319,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
             public Size ClientSize { get; }
             public double RenderScaling => 1;
 
-            public IRenderTarget CreateRenderTarget(IVisualBrushRenderer visualBrushRenderer)
+            public IRenderTarget CreateRenderTarget()
             {
                 throw new NotImplementedException();
             }

tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests_Virtualization_Simple.cs

@@ -1013,7 +1013,7 @@ namespace Avalonia.Controls.UnitTests.Presenters
             public Size ClientSize { get; }
             public double RenderScaling => 1;
 
-            public IRenderTarget CreateRenderTarget(IVisualBrushRenderer visualBrushRenderer)
+            public IRenderTarget CreateRenderTarget()
             {
                 throw new NotImplementedException();
             }

tests/Avalonia.UnitTests/TestRoot.cs

@@ -64,7 +64,7 @@ namespace Avalonia.UnitTests
 
         public bool ShowAccessKeys { get; set; }
 
-        public IRenderTarget CreateRenderTarget(IVisualBrushRenderer visualBrushRenderer) => _renderTarget;
+        public IRenderTarget CreateRenderTarget() => _renderTarget;
 
         public void Invalidate(Rect rect)
         {

tests/Avalonia.UnitTests/TestTemplatedRoot.cs

@@ -47,7 +47,7 @@ namespace Avalonia.UnitTests
 
         public IRenderer Renderer => null;
 
-        public IRenderTarget CreateRenderTarget(IVisualBrushRenderer visualBrushRenderer)
+        public IRenderTarget CreateRenderTarget()
         {
             throw new NotImplementedException();
         }