NtRefresh: Use D/L mode-aware color provider for background

This CL changes to use AshColorProvider to set the background color of
the refreshed notifications to correctly support the ash’s Dark/Light
mode.
Also, this CL splits out the ARC/ash-related code from
//ui/message_center to //ash/p/c/external_arc.

BUG=b:211336495
TEST=manual

Change-Id: I7eefd2130e508689585d9be6b9c0e51c3685f090
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3565523
Reviewed-by: Yuichiro Hanada <yhanada@chromium.org>
Reviewed-by: Yoshiki Iguchi <yoshiki@chromium.org>
Commit-Queue: Toshiki Kikuchi <toshikikikuchi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#988412}

ash/public/cpp/external_arc/message_center/arc_notification_view.cc

@@ -124,6 +124,19 @@ void ArcNotificationView::UpdateCornerRadius(int top_radius,
   content_view_->UpdateCornerRadius(top_radius, bottom_radius);
 }
 
+void ArcNotificationView::UpdateBackgroundPainter() {
+  if (features::IsNotificationsRefreshEnabled()) {
+    SetBackground(views::CreateSolidBackground(
+        shown_in_popup_ ? AshColorProvider::Get()->GetBaseLayerColor(
+                              AshColorProvider::BaseLayerType::kTransparent80)
+                        : AshColorProvider::Get()->GetControlsLayerColor(
+                              AshColorProvider::ControlsLayerType::
+                                  kControlBackgroundColorInactive)));
+  } else {
+    MessageView::UpdateBackgroundPainter();
+  }
+}
+
 void ArcNotificationView::UpdateControlButtonsVisibility() {
   content_view_->UpdateControlButtonsVisibility();
 }
@@ -202,12 +215,6 @@ void ArcNotificationView::OnThemeChanged() {
         GetColorProvider()->GetColor(ui::kColorFocusableBorderFocused),
         gfx::Insets::TLBR(0, 1, 3, 2));
   }
-
-  if (features::IsNotificationsRefreshEnabled() && shown_in_popup_) {
-    SetBackground(
-        views::CreateSolidBackground(AshColorProvider::Get()->GetBaseLayerColor(
-            AshColorProvider::BaseLayerType::kTransparent80)));
-  }
 }
 
 void ArcNotificationView::OnContainerAnimationEnded() {

ash/public/cpp/external_arc/message_center/arc_notification_view.h

@@ -64,6 +64,7 @@ class ArcNotificationView : public message_center::MessageView,
   void OnSnoozeButtonPressed(const ui::Event& event) override;
   void OnThemeChanged() override;
   void UpdateCornerRadius(int top_radius, int bottom_radius) override;
+  void UpdateBackgroundPainter() override;
   base::TimeDelta GetBoundsAnimationDuration(
       const message_center::Notification&) const override;
 

ui/message_center/views/message_view.cc

@@ -508,15 +508,6 @@ void MessageView::UpdateBackgroundPainter() {
       is_active_ ? ui::kColorNotificationBackgroundActive
                  : ui::kColorNotificationBackgroundInactive);
 
-#if BUILDFLAG(IS_CHROMEOS_ASH)
-  if (ash::features::IsNotificationsRefreshEnabled()) {
-    // These are the same colors provided by AshColorProvider.
-    // See ash/style/ash_color_provider.cc
-    background_color = is_active_ ? SkColorSetA(SK_ColorBLACK, 0x0D)
-                                  : SkColorSetA(SK_ColorWHITE, 0x1A);
-  }
-#endif
-
   SetBackground(views::CreateBackgroundFromPainter(
       std::make_unique<NotificationBackgroundPainter>(
           top_radius_, bottom_radius_, background_color)));

ui/message_center/views/message_view.h

@@ -217,6 +217,9 @@ class MESSAGE_CENTER_EXPORT MessageView
   // Changes the background color and schedules a paint.
   virtual void SetDrawBackgroundAsActive(bool active);
 
+  // Updates the background painter using the themed background color and radii.
+  virtual void UpdateBackgroundPainter();
+
   void UpdateControlButtonsVisibilityWithNotification(
       const Notification& notification);
 
@@ -243,9 +246,6 @@ class MESSAGE_CENTER_EXPORT MessageView
   // Returns if the control buttons should be shown.
   bool ShouldShowControlButtons() const;
 
-  // Updates the background painter using the themed background color and radii.
-  void UpdateBackgroundPainter();
-
   void UpdateNestedBorder();
 
   std::string notification_id_;