Fixes stale hover or ink ripple visuals when dragging over extension buttons

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_view_state.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/keycodes/keyboard_codes.h"
@@ skipping 168 matching lines @@
     }
   }
   if (notify_action_ == NOTIFY_ON_RELEASE)
     OnClickCanceled(event);
 }
 
 void CustomButton::OnMouseCaptureLost() {
   // Starting a drag results in a MouseCaptureLost, we need to ignore it.
   if (state_ != STATE_DISABLED && !InDrag())
     SetState(STATE_NORMAL);
+  if (ink_drop_delegate_)
+    ink_drop_delegate_->OnAction(views::InkDropState::HIDDEN);
 }
 
 void CustomButton::OnMouseEntered(const ui::MouseEvent& event) {
   if (state_ != STATE_DISABLED)
     SetState(STATE_HOVERED);
 }
 
 void CustomButton::OnMouseExited(const ui::MouseEvent& event) {
   // Starting a drag results in a MouseExited, we need to ignore it.
   if (state_ != STATE_DISABLED && !InDrag())
@@ skipping 223 matching lines @@
   return GetWidget() && GetWidget()->GetTopLevelWidget() != GetWidget();
 }
 
 bool CustomButton::FocusInChildWidget() const {
   return GetWidget() &&
          GetWidget()->GetRootView()->Contains(
              GetFocusManager()->GetFocusedView());
 }
 
 }  // namespace views