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..2d3a17c64d04e1679b0976b42f1f108a16e5d4fd 100644
--- a/ui/views/controls/button/custom_button.cc
+++ b/ui/views/controls/button/custom_button.cc
@@ -318,10 +318,8 @@ 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);
+  ui::Event synthetic_event(ui::ET_UNKNOWN, ui::EventTimeForNow(),

[sky, 2017/06/22 00:55:48]

Given we create an accelerator from a KeyEvent, wouldn't it make more sense to
convert the accelerator to a KeyEvent here?

[bruthig, 2017/07/10 18:03:13]

Done.

+                            ui::EF_IS_SYNTHESIZED);
   NotifyClick(synthetic_event);
   return true;
 }