[ash-md] Allows ToggleButton to have a border and adds focus rectangle

ui/views/controls/button/toggle_button.h

Index: ui/views/controls/button/toggle_button.h
diff --git a/ui/views/controls/button/toggle_button.h b/ui/views/controls/button/toggle_button.h
index eb8efadfbd22aea374cab8b80f86fdc1b46772d3..327220deb1dde95c048d1b72dcfa174cfd9f14a7 100644
--- a/ui/views/controls/button/toggle_button.h
+++ b/ui/views/controls/button/toggle_button.h
@@ -10,6 +10,8 @@
 
 namespace views {
 
+class Painter;
+
 // This view presents a button that has two states: on and off. This is similar
 // to a checkbox but has no text and looks more like a two-state horizontal
 // slider.
@@ -23,11 +25,21 @@ class VIEWS_EXPORT ToggleButton : public CustomButton {
   void SetIsOn(bool is_on, bool animate);
   bool is_on() const { return is_on_; }
 
+  void set_focus_painter(std::unique_ptr<Painter> focus_painter);
+
+ protected:
+  // View:
+  void OnFocus() override;
+  void OnBlur() override;
+
  private:
   friend class TestToggleButton;
   class ThumbView;
 
-  // Calculates the bounding box for the thumb (the circle).
+  // Calculates and returns the bounding box for the track.
+  gfx::RectF GetTrackBounds() const;
+
+  // Calculates and returns the bounding box for the thumb (the circle).
   gfx::Rect GetThumbBounds() const;
 
   // Updates position and color of the thumb.
@@ -55,6 +67,7 @@ class VIEWS_EXPORT ToggleButton : public CustomButton {
   bool is_on_;
   gfx::SlideAnimation slide_animation_;
   ThumbView* thumb_view_;
+  std::unique_ptr<Painter> focus_painter_;
 
   DISALLOW_COPY_AND_ASSIGN(ToggleButton);
 };