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

ui/keyboard/keyboard_controller.cc

Index: ui/keyboard/keyboard_controller.cc
diff --git a/ui/keyboard/keyboard_controller.cc b/ui/keyboard/keyboard_controller.cc
index 40065d27845179576ccee19a2564195da15f69a0..eec0304bd4749e5caa8ed7283589964fa70dfd50 100644
--- a/ui/keyboard/keyboard_controller.cc
+++ b/ui/keyboard/keyboard_controller.cc
@@ -109,7 +109,7 @@ class KeyboardWindowDelegate : public aura::WindowDelegate {
   }
   bool CanFocus() override { return false; }
   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 { delete this; }