[ash-md] Updated layout of Brightness and Audio system menu rows to the material design spec.

ash/common/system/tray/actionable_view.h

 // Copyright 2013 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_SYSTEM_TRAY_ACTIONABLE_VIEW_H_
 #define ASH_COMMON_SYSTEM_TRAY_ACTIONABLE_VIEW_H_
 
 #include "ash/ash_export.h"
 #include "base/macros.h"
 #include "ui/gfx/geometry/rect.h"
@@ skipping 62 matching lines @@
   // the not-destroyed case ButtonPressed() uses member variables.
   bool* destroyed_;
 
   SystemTrayItem* owner_;
 
   base::string16 accessible_name_;
 
   DISALLOW_COPY_AND_ASSIGN(ActionableView);
 };
 
+// An ActionableView that can be used with a ButtonListener instead of having to
+// extend ActionableView and override PerformAction().
+class ASH_EXPORT ButtonListenerActionableView : public ActionableView {
+ public:
+  ButtonListenerActionableView(SystemTrayItem* owner,
+                               views::ButtonListener* listener);
+
+  // ActionableView:
+  bool PerformAction(const ui::Event& event) override;
+
+ private:
+  views::ButtonListener* listener_;
+
+  DISALLOW_COPY_AND_ASSIGN(ButtonListenerActionableView);
+};
+
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_TRAY_ACTIONABLE_VIEW_H_