Remove extra focus ring around notification close button

Bug: 1025278
Change-Id: I011cf937cab3a3e41eed93ecae8e768def4ae27e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1919564Reviewed-by: Tim Song <tengs@chromium.org>
Commit-Queue: Ahmed Mehfooz <amehfooz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715912}

ui/message_center/views/padded_button.cc

@@ -21,8 +21,6 @@ namespace message_center {
 PaddedButton::PaddedButton(views::ButtonListener* listener)
     : views::ImageButton(listener) {
   SetFocusForPlatform();
-  SetFocusPainter(views::Painter::CreateSolidFocusPainter(
-      kFocusBorderColor, gfx::Insets(1, 2, 2, 2)));
   SetBackground(views::CreateSolidBackground(kControlButtonBackgroundColor));
   SetBorder(views::CreateEmptyBorder(gfx::Insets(kControlButtonBorderSize)));
   set_animate_on_state_change(false);