Replaced synthetic MouseEvent in CustomButton::AcceleratorPressed() with just an Event.

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 4ed90e2918ab4cc41cfb83aa30882fe62feafba9..356d274b4c5516279391feae9810dbf0bd2d7904 100644
--- a/ui/views/controls/button/custom_button.cc
+++ b/ui/views/controls/button/custom_button.cc
@@ -318,11 +318,7 @@ void CustomButton::OnGestureEvent(ui::GestureEvent* event) {
 
 bool CustomButton::AcceleratorPressed(const ui::Accelerator& accelerator) {
   SetState(STATE_NORMAL);
-  // TODO(beng): remove once NotifyClick takes ui::Event.
-  ui::MouseEvent synthetic_event(
-      ui::ET_MOUSE_RELEASED, gfx::Point(), gfx::Point(), ui::EventTimeForNow(),
-      ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON);
-  NotifyClick(synthetic_event);
+  NotifyClick(accelerator.ToKeyEvent());
   return true;
 }