Move message_center::CustomNotificationView to arc::ArcNotificationView

ui/arc/BUILD.gn

Index: ui/arc/BUILD.gn
diff --git a/ui/arc/BUILD.gn b/ui/arc/BUILD.gn
index bcefece86c37504a130b74b571a9c91bbc9b0ab7..c3fa024aaf51886c74df2e240ca5b6be83c8f3f6 100644
--- a/ui/arc/BUILD.gn
+++ b/ui/arc/BUILD.gn
@@ -18,6 +18,8 @@ static_library("arc") {
     "notification/arc_notification_manager.h",
     "notification/arc_notification_surface_manager.cc",
     "notification/arc_notification_surface_manager.h",
+    "notification/arc_notification_view.cc",
+    "notification/arc_notification_view.h",
   ]
 
   deps = [
@@ -47,6 +49,7 @@ test("ui_arc_unittests") {
   testonly = true
   sources = [
     "notification/arc_notification_manager_unittest.cc",
+    "notification/arc_notification_view_unittest.cc",
     "test/run_all_unittests.cc",
   ]
 
@@ -57,6 +60,12 @@ test("ui_arc_unittests") {
     "//components/arc:arc_test_support",
     "//mojo/edk/system",
     "//testing/gtest",
+    "//ui/base:test_support",
+    "//ui/base/ime",
+    "//ui/events",
+    "//ui/gl:test_support",
     "//ui/message_center:test_support",
+    "//ui/views",
+    "//ui/views:test_support",
   ]
 }