[ash-md] Added ink drop to system menu rows that inherit from ActionableView.

ash/common/system/update/tray_update.cc

Index: ash/common/system/update/tray_update.cc
diff --git a/ash/common/system/update/tray_update.cc b/ash/common/system/update/tray_update.cc
index f24da1468077d3ad2143732a3cc085a726682881..902cdf82f47cde9b1a19c5f9b1c1df4c5515e485 100644
--- a/ash/common/system/update/tray_update.cc
+++ b/ash/common/system/update/tray_update.cc
@@ -108,6 +108,9 @@ class UpdateView : public ActionableView {
     label_ = new views::Label(label_text);
     AddChildView(label_);
     SetAccessibleName(label_text);
+
+    if (MaterialDesignController::IsSystemTrayMenuMaterial())
+      SetInkDropMode(InkDropHostView::InkDropMode::ON);
   }
 
   ~UpdateView() override {}