mash: Convert StatusAreaWidgetDelegate to wm common types

ash/common/shelf/wm_shelf.h

 // Copyright 2016 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_COMMON_SHELF_WM_SHELF_H_
 #define ASH_COMMON_SHELF_WM_SHELF_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/shelf/shelf_types.h"
 
@@ skipping 46 matching lines @@
   virtual gfx::Rect GetIdealBounds() = 0;
 
   virtual gfx::Rect GetUserWorkAreaBounds() const = 0;
 
   virtual void UpdateIconPositionForWindow(WmWindow* window) = 0;
 
   // Returns the screen bounds of the item for the specified window. If there is
   // no item for the specified window an empty rect is returned.
   virtual gfx::Rect GetScreenBoundsOfItemIconForWindow(WmWindow* window) = 0;
 
+  // Handles a gesture |event| coming from a |target_window| outside the shelf
+  // (e.g. the status area widget). Allows support for behaviors like toggling
+  // auto-hide with an edge swipe, even if that gesture event hits another
+  // window. Returns true if the event was handled.
+  virtual bool ProcessGestureEvent(const ui::GestureEvent& event,
+                                   WmWindow* target_window) = 0;
+
   // TODO(jamescook): Nuke when ash_sysui is removed. http://crbug.com/621112
   virtual void UpdateAutoHideForMouseEvent(ui::MouseEvent* event) = 0;
   virtual void UpdateAutoHideForGestureEvent(ui::GestureEvent* event) = 0;
 
   virtual void AddObserver(WmShelfObserver* observer) = 0;
   virtual void RemoveObserver(WmShelfObserver* observer) = 0;
 
   // Simulates a virtual keyboard bounds update.
   virtual void SetKeyboardBoundsForTesting(const gfx::Rect& bounds) = 0;
 
  protected:
   virtual ~WmShelf() {}
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SHELF_WM_SHELF_H_