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

ui/views/controls/button/custom_button.cc

 // Copyright (c) 2012 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.
 
 #include "ui/views/controls/button/custom_button.h"
 
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/keycodes/keyboard_codes.h"
@@ skipping 300 matching lines @@
   } else if (event->type() == ui::ET_GESTURE_TAP_CANCEL ||
              event->type() == ui::ET_GESTURE_END) {
     SetState(STATE_NORMAL);
   }
   if (!event->handled())
     Button::OnGestureEvent(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;
 }
 
 bool CustomButton::SkipDefaultKeyEventProcessing(const ui::KeyEvent& event) {
   // If this button is focused and the user presses space or enter, don't let
   // that be treated as an accelerator if there is a key click action
   // corresponding to it.
   return GetKeyClickActionForEvent(event) != KeyClickAction::CLICK_NONE;
 }
@@ skipping 184 matching lines @@
         GetInkDrop()->GetTargetInkDropState() ==
             views::InkDropState::ALTERNATE_ACTION_PENDING) {
       AnimateInkDrop(views::InkDropState::HIDDEN,
                      ui::LocatedEvent::FromIfValid(&event));
     }
   }
   Button::OnClickCanceled(event);
 }
 
 }  // namespace views