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

ash/common/system/tray/actionable_view.cc

Index: ash/common/system/tray/actionable_view.cc
diff --git a/ash/common/system/tray/actionable_view.cc b/ash/common/system/tray/actionable_view.cc
index 07be3c018ee83d232b94863122483498c9e338f0..53d3f59cf6f039edf6c196cd3507b2b3a83ff9e1 100644
--- a/ash/common/system/tray/actionable_view.cc
+++ b/ash/common/system/tray/actionable_view.cc
@@ -127,4 +127,16 @@ void ActionableView::ButtonPressed(Button* sender, const ui::Event& event) {
   }
 }
 
+ButtonListenerActionableView::ButtonListenerActionableView(
+    SystemTrayItem* owner,
+    views::ButtonListener* listener)
+    : ActionableView(owner), listener_(listener) {}
+
+// ButtonListenerActionableView::~ButtonListenerActionableView() {}
+
+bool ButtonListenerActionableView::PerformAction(const ui::Event& event) {
+  listener_->ButtonPressed(this, event);
+  return true;
+}
+
 }  // namespace ash