events: Change gesture-event handler in EventHandler to not return any values.

ash/system/tray/tray_views.h

 // 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_VIEWS_H_
 #define ASH_SYSTEM_TRAY_TRAY_VIEWS_H_
 
 #include "ash/ash_export.h"
 #include "ash/wm/shelf_types.h"
 #include "ui/gfx/font.h"
@@ skipping 64 matching lines @@
 
   // Overridden from views::View.
   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseCaptureLost() OVERRIDE;
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
   virtual void OnPaintFocusBorder(gfx::Canvas* canvas) OVERRIDE;
 
   // Overridden from ui::EventHandler.
-  virtual ui::EventResult OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
+  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
  private:
   string16 accessible_name_;
   bool has_capture_;
 
   DISALLOW_COPY_AND_ASSIGN(ActionableView);
 };
 
 class ViewClickListener {
  public:
@@ skipping 200 matching lines @@
 void SetTrayImageItemBorder(views::View* tray_view, ShelfAlignment alignment);
 // Sets the empty border around a label tray item for adjusting the space
 // around it.
 void SetTrayLabelItemBorder(TrayItemView* tray_view,
                             ShelfAlignment alignment);
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_TRAY_VIEWS_H_