Do not activate system tray bubble by default

ash/aura/key_event_watcher_aura.cc

Index: ash/aura/key_event_watcher_aura.cc
diff --git a/ash/wm/maximize_mode/maximize_mode_event_handler_aura.cc b/ash/aura/key_event_watcher_aura.cc
similarity index 54%
copy from ash/wm/maximize_mode/maximize_mode_event_handler_aura.cc
copy to ash/aura/key_event_watcher_aura.cc
index 749d2497636a1014e9288c461a6581aa81c80724..66a8a8d92f83d1c4e3bcfe7ec930e376e05753a9 100644
--- a/ash/wm/maximize_mode/maximize_mode_event_handler_aura.cc
+++ b/ash/aura/key_event_watcher_aura.cc
@@ -2,26 +2,24 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ash/wm/maximize_mode/maximize_mode_event_handler_aura.h"
+#include "ash/aura/key_event_watcher_aura.h"
 
 #include "ash/shell.h"
 #include "ui/events/event.h"
 
 namespace ash {
-namespace wm {
 
-MaximizeModeEventHandlerAura::MaximizeModeEventHandlerAura() {
+KeyEventWatcherAura::KeyEventWatcherAura() {
   Shell::GetInstance()->AddPreTargetHandler(this);
 }
 
-MaximizeModeEventHandlerAura::~MaximizeModeEventHandlerAura() {
+KeyEventWatcherAura::~KeyEventWatcherAura() {
   Shell::GetInstance()->RemovePreTargetHandler(this);
 }
 
-void MaximizeModeEventHandlerAura::OnTouchEvent(ui::TouchEvent* event) {
-  if (ToggleFullscreen(*event))
+void KeyEventWatcherAura::OnKeyEvent(ui::KeyEvent* event) {
+  if (HandleKeyEvent(*event))
     event->StopPropagation();
 }
 
-}  // namespace wm
 }  // namespace ash