Initial implementation of new-style notification

ui/arc/notification/arc_custom_notification_view.cc

Index: ui/arc/notification/arc_custom_notification_view.cc
diff --git a/ui/arc/notification/arc_custom_notification_view.cc b/ui/arc/notification/arc_custom_notification_view.cc
index c84e64642e490599258fa8245a8c856e11661246..d5ec3161161657ef371cf44f3e81bdbc46e2d916 100644
--- a/ui/arc/notification/arc_custom_notification_view.cc
+++ b/ui/arc/notification/arc_custom_notification_view.cc
@@ -10,6 +10,7 @@
 #include "components/exo/notification_surface.h"
 #include "components/exo/surface.h"
 #include "ui/accessibility/ax_action_data.h"
+#include "ui/accessibility/ax_node_data.h"
 #include "ui/arc/notification/arc_notification_view.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
@@ -251,6 +252,7 @@ ArcCustomNotificationView::ArcCustomNotificationView(ArcNotificationItem* item)
   // Create a layer as an anchor to insert surface copy during a slide.
   SetPaintToLayer();
   UpdatePreferredSize();
+  UpdateAccessibleName();
 }
 
 ArcCustomNotificationView::~ArcCustomNotificationView() {
@@ -483,6 +485,14 @@ bool ArcCustomNotificationView::ShouldUpdateControlButtonsColor() const {
   return false;
 }
 
+void ArcCustomNotificationView::UpdateAccessibleName() {
+  // Don't update the accessible name when we are about to be destroyed.
+  if (!item_)
+    return;
+
+  accessible_name_ = item_->GetAccessibleName();
+}
+
 void ArcCustomNotificationView::ViewHierarchyChanged(
     const views::View::ViewHierarchyChangedDetails& details) {
   views::Widget* widget = GetWidget();
@@ -623,6 +633,12 @@ bool ArcCustomNotificationView::HandleAccessibleAction(
   return false;
 }
 
+void ArcCustomNotificationView::GetAccessibleNodeData(
+    ui::AXNodeData* node_data) {
+  node_data->role = ui::AX_ROLE_BUTTON;
+  node_data->SetName(accessible_name_);
+}
+
 void ArcCustomNotificationView::ButtonPressed(views::Button* sender,
                                               const ui::Event& event) {
   if (item_ && !item_->GetPinned() && sender == close_button_.get()) {
@@ -659,6 +675,7 @@ void ArcCustomNotificationView::OnItemDestroying() {
 }
 
 void ArcCustomNotificationView::OnItemUpdated() {
+  UpdateAccessibleName();
   UpdatePinnedState();
   UpdateSnapshot();
   if (ShouldUpdateControlButtonsColor())