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_;

[sky, 2013/05/31 17:04:50]

What's the compelling reason to have this owned by the shelf?

[rharrison, 2013/06/05 18:24:04]

It ties the filter's lifespan to the shelf, thus the code doesn't have to deal
with 'what if the shelf doesn't exist', since it needs to query the shelf about
its location. Overall I am attempting to localize the code to where it is
needed/used.

 
   ObserverList<ShelfLayoutManagerObserver> observers_;