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

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index a2c24a18f237fdbbc8e9a4d38b489a15ea7ceb5e..db9c0b24cac556ec769c745c53d84a886f9b56a5 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -285,7 +285,7 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
       const gfx::Point& location) override;
   bool CanFocus() override;
   void OnCaptureLost() override;
-  void OnPaint(gfx::Canvas* canvas) override;
+  void OnPaint(const ui::PaintContext& context) override;
   void OnDeviceScaleFactorChanged(float device_scale_factor) override;
   void OnWindowDestroying(aura::Window* window) override;
   void OnWindowDestroyed(aura::Window* window) override;