WIP: Eliminate event.target() usage from TrayEventFilter

ash/system/tray/system_tray.cc

Index: ash/system/tray/system_tray.cc
diff --git a/ash/system/tray/system_tray.cc b/ash/system/tray/system_tray.cc
index 5e65db2e9e1ba76a5f68b44801016b6394911c68..5460050332934a20c6bad174b29b671b2395513e 100644
--- a/ash/system/tray/system_tray.cc
+++ b/ash/system/tray/system_tray.cc
@@ -703,15 +703,19 @@ TrayCast* SystemTray::GetTrayCastForTesting() const { return tray_cast_; }
 TrayDate* SystemTray::GetTrayDateForTesting() const { return tray_date_; }
 
 bool SystemTray::PerformAction(const ui::Event& event) {
+  //JAMES - this isn't called on mash when you click on the system tray bubble
+  LOG(ERROR) << "JAMES PerformAction";
   // If we're already showing the default view, hide it; otherwise, show it
   // (and hide any popup that's currently shown).
   if (HasSystemBubbleType(SystemTrayBubble::BUBBLE_TYPE_DEFAULT)) {
+    LOG(ERROR) << "JAMES close";
     system_bubble_->bubble()->Close();
   } else {
     int arrow_offset = TrayBubbleView::InitParams::kArrowDefaultOffset;
     if (event.IsMouseEvent() || event.type() == ui::ET_GESTURE_TAP) {
       const ui::LocatedEvent& located_event =
           static_cast<const ui::LocatedEvent&>(event);
+      LOG(ERROR) << "JAMES location " << located_event.location().ToString();
       if (wm::IsHorizontalAlignment(shelf_alignment())) {
         gfx::Point point(located_event.x(), 0);
         ConvertPointToWidget(this, &point);