Add touch gestures to views menu controls.

ui/views/controls/button/custom_button.cc

Index: ui/views/controls/button/custom_button.cc
diff --git a/ui/views/controls/button/custom_button.cc b/ui/views/controls/button/custom_button.cc
index 897c772ff0b97e50e2ca4115ae8b636809b50a24..104a8230c8ff24977b19b43478cedede21e1d871 100644
--- a/ui/views/controls/button/custom_button.cc
+++ b/ui/views/controls/button/custom_button.cc
@@ -195,7 +195,7 @@ bool CustomButton::OnKeyReleased(const KeyEvent& event) {
 
 ui::GestureStatus CustomButton::OnGestureEvent(const GestureEvent& event) {
   if (state_ == BS_DISABLED)
-    return ui::GESTURE_STATUS_UNKNOWN;
+    return Button::OnGestureEvent(event);
 
   if (event.type() == ui::ET_GESTURE_TAP) {
     // Set the button state to hot and start the animation fully faded in. The