Re-factor Ash Message Center code part 2/4

ash/system/tray/tray_event_filter.h

Index: ash/system/tray/tray_event_filter.h
diff --git a/ash/system/tray/tray_event_filter.h b/ash/system/tray/tray_event_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..1ab507719da22c00443062d72d6421cfbbf88fbc
--- /dev/null
+++ b/ash/system/tray/tray_event_filter.h
@@ -0,0 +1,52 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ASH_SYSTEM_TRAY_TRAY_EVENT_FILTER_H_
+#define ASH_SYSTEM_TRAY_TRAY_EVENT_FILTER_H_
+
+#include "base/basictypes.h"
+#include "ui/aura/event_filter.h"
+#include "ui/base/events/event.h"
+
+namespace aura {
+class Window;
+}
+
+namespace ash {
+namespace internal {
+
+class TrayBubbleWrapper;
+
+// Handles events for a tray bubble.
+
+class TrayEventFilter : public aura::EventFilter {
+ public:
+  explicit TrayEventFilter(TrayBubbleWrapper* wrapper);
+  virtual ~TrayEventFilter();
+
+  // Overridden from aura::EventFilter.
+  virtual bool PreHandleKeyEvent(aura::Window* target,
+                                 ui::KeyEvent* event) OVERRIDE;
+  virtual bool PreHandleMouseEvent(aura::Window* target,
+                                   ui::MouseEvent* event) OVERRIDE;
+  virtual ui::TouchStatus PreHandleTouchEvent(aura::Window* target,
+                                              ui::TouchEvent* event) OVERRIDE;
+  virtual ui::EventResult PreHandleGestureEvent(
+      aura::Window* target,
+      ui::GestureEvent* event) OVERRIDE;
+
+ private:
+  // Returns true if the event is handled.
+  bool ProcessLocatedEvent(aura::Window* target,
+                           const ui::LocatedEvent& event);
+
+  TrayBubbleWrapper* wrapper_;
+
+  DISALLOW_COPY_AND_ASSIGN(TrayEventFilter);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_TRAY_TRAY_EVENT_FILTER_H_