[Ash Tray] Update icon color of DnD toggle.

BUG=1111157

Change-Id: I7c3425fb69de3e671027d301e82a810efd989ba3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2464345Reviewed-by: Ahmed Mehfooz <amehfooz@chromium.org>
Commit-Queue: Tim Song <tengs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#815916}

ash/system/message_center/notifier_settings_view.cc

@@ -552,8 +552,7 @@ void NotifierSettingsView::SetQuietModeState(bool is_quiet_mode) {
         kNotificationCenterDoNotDisturbOnIcon, kMenuIconSize, icon_color));
   } else {
     quiet_mode_icon_->SetImage(gfx::CreateVectorIcon(
-        kNotificationCenterDoNotDisturbOffIcon, kMenuIconSize,
-        AshColorProvider::GetDisabledColor(icon_color)));
+        kNotificationCenterDoNotDisturbOffIcon, kMenuIconSize, icon_color));
   }
 }