Make View::Paint use ui::PaintRecorder to access PaintContext's canvas

ui/views/widget/widget.cc

Index: ui/views/widget/widget.cc
diff --git a/ui/views/widget/widget.cc b/ui/views/widget/widget.cc
index cd015305e8382a24a240a61b89849451fd599702..6894b197b66319d0920b80496119bf3329ddda12 100644
--- a/ui/views/widget/widget.cc
+++ b/ui/views/widget/widget.cc
@@ -15,6 +15,7 @@
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/compositor/compositor.h"
 #include "ui/compositor/layer.h"
+#include "ui/compositor/paint_context.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/gfx/image/image_skia.h"
@@ -1179,12 +1180,12 @@ bool Widget::OnNativeWidgetPaintAccelerated(const gfx::Rect& dirty_region) {
   return true;
 }
 
-void Widget::OnNativeWidgetPaint(gfx::Canvas* canvas) {
+void Widget::OnNativeWidgetPaint(const ui::PaintContext& context) {
   // On Linux Aura, we can get here during Init() because of the
   // SetInitialBounds call.
   if (!native_widget_initialized_)
     return;
-  GetRootView()->Paint(View::PaintContext(canvas, GetLayer()->PaintRect()));
+  GetRootView()->Paint(context);
 }
 
 int Widget::GetNonClientComponent(const gfx::Point& point) {