Move bezel event routing for the shelf into ShelfLayoutManager

ash/shelf/shelf_layout_manager.h

Index: ash/shelf/shelf_layout_manager.h
diff --git a/ash/shelf/shelf_layout_manager.h b/ash/shelf/shelf_layout_manager.h
index e2018f8eaa181fd9f452a39f03aa242b07b1bb37..2fa55624b4394e685a0a7b2a301bbfb408c52f5e 100644
--- a/ash/shelf/shelf_layout_manager.h
+++ b/ash/shelf/shelf_layout_manager.h
@@ -5,6 +5,8 @@
 #ifndef ASH_SHELF_SHELF_LAYOUT_MANAGER_H_
 #define ASH_SHELF_SHELF_LAYOUT_MANAGER_H_
 
+#include <vector>
+
 #include "ash/ash_export.h"
 #include "ash/launcher/launcher.h"
 #include "ash/shelf/background_animator.h"
@@ -194,6 +196,7 @@ class ASH_EXPORT ShelfLayoutManager :
 
  private:
   class AutoHideEventFilter;
+  class BezelEventFilter;
   class UpdateShelfObserver;
   friend class ash::ScreenAsh;
   friend class PanelLayoutManagerTest;
@@ -312,7 +315,10 @@ class ASH_EXPORT ShelfLayoutManager :
 
   // EventFilter used to detect when user moves the mouse over the launcher to
   // trigger showing the launcher.
-  scoped_ptr<AutoHideEventFilter> event_filter_;
+  scoped_ptr<AutoHideEventFilter> auto_hide_event_filter_;
+
+  // EventFilter used to detect when user issues a gesture on a bezel sensor.
+  scoped_ptr<BezelEventFilter> bezel_event_filter_;
 
   ObserverList<ShelfLayoutManagerObserver> observers_;