Fixing focus highlight on high DPI devices for accessibility

ash/system/tray/tray_popup_header_button.cc

Index: ash/system/tray/tray_popup_header_button.cc
diff --git a/ash/system/tray/tray_popup_header_button.cc b/ash/system/tray/tray_popup_header_button.cc
index 7e20c00e4e752c50165d4e0847383f1505a196bd..ceeda043ad00fa4107c0f4dc3238c1ac5c5e1dc5 100644
--- a/ash/system/tray/tray_popup_header_button.cc
+++ b/ash/system/tray/tray_popup_header_button.cc
@@ -37,6 +37,10 @@ TrayPopupHeaderButton::TrayPopupHeaderButton(views::ButtonListener* listener,
   SetAccessibleName(bundle.GetLocalizedString(accessible_name_id));
   set_focusable(true);
   set_request_focus_on_press(false);
+
+  set_focus_border(views::FocusBorder::CreateSolidFocusBorder(
+      kFocusBorderColor,
+      gfx::Insets(1, 2, 2, 3)));
 }
 
 TrayPopupHeaderButton::~TrayPopupHeaderButton() {}
@@ -57,13 +61,6 @@ void TrayPopupHeaderButton::OnPaintBorder(gfx::Canvas* canvas) {
       ash::kBorderDarkColor);
 }
 
-void TrayPopupHeaderButton::OnPaintFocusBorder(gfx::Canvas* canvas) {
-  if (HasFocus()) {
-    canvas->DrawRect(gfx::Rect(2, 1, width() - 4, height() - 3),
-                     kFocusBorderColor);
-  }
-}
-
 void TrayPopupHeaderButton::StateChanged() {
   SchedulePaint();
 }