Simplify accelerated paint and remove windows CanvasSkiaPaint

ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc b/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
index a5e41d9089928ab5e14ca3f34ecdbc16661f8669..1960cf16f55cc57b4dc98edef08dfc87c524e11d 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
@@ -898,15 +898,10 @@ void DesktopWindowTreeHostWin::HandleInputLanguageChange(
       input_method()->OnInputLocaleChanged();
 }
 
-bool DesktopWindowTreeHostWin::HandlePaintAccelerated(
+void DesktopWindowTreeHostWin::HandlePaintAccelerated(
     const gfx::Rect& invalid_rect) {
-  return native_widget_delegate_->OnNativeWidgetPaintAccelerated(invalid_rect);
-}
-
-void DesktopWindowTreeHostWin::HandlePaint(gfx::Canvas* canvas) {
-  // It appears possible to get WM_PAINT after WM_DESTROY.
   if (compositor())
-    compositor()->ScheduleRedrawRect(gfx::Rect());
+    compositor()->ScheduleRedrawRect(invalid_rect);
 }
 
 bool DesktopWindowTreeHostWin::HandleTooltipNotify(int w_param,