Do not activate system tray bubble by default

ash/common/system/tray/actionable_view.cc

Index: ash/common/system/tray/actionable_view.cc
diff --git a/ash/common/system/tray/actionable_view.cc b/ash/common/system/tray/actionable_view.cc
index 0bdbabef30c1bd109c52a3cf878fec1a5212cd83..57dd1a99a900fea1ccc710d438c194ccfc0182ec 100644
--- a/ash/common/system/tray/actionable_view.cc
+++ b/ash/common/system/tray/actionable_view.cc
@@ -5,6 +5,8 @@
 #include "ash/common/system/tray/actionable_view.h"
 
 #include "ash/common/ash_constants.h"
+#include "ash/common/system/tray/system_tray.h"
+#include "ash/common/system/tray/system_tray_item.h"
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/gfx/canvas.h"
 
@@ -13,7 +15,8 @@ namespace ash {
 // static
 const char ActionableView::kViewClassName[] = "tray/ActionableView";
 
-ActionableView::ActionableView() : has_capture_(false) {
+ActionableView::ActionableView(SystemTrayItem* owner)
+    : owner_(owner), has_capture_(false) {
   SetFocusBehavior(FocusBehavior::ALWAYS);
 }
 
@@ -88,4 +91,9 @@ void ActionableView::OnGestureEvent(ui::GestureEvent* event) {
     event->SetHandled();
 }
 
+void ActionableView::CloseSystemBubble() {
+  DCHECK(owner_);
+  owner_->system_tray()->CloseSystemBubble();
+}
+
 }  // namespace ash