Make the material design ripple effect more visible on a quick action (single click or single tap)

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 124 matching lines @@
   UpdateInkDropHoverState();
 }
 
 const char* CustomButton::GetClassName() const {
   return kViewClassName;
 }
 
 bool CustomButton::OnMousePressed(const ui::MouseEvent& event) {
   if (state_ == STATE_DISABLED)
     return true;
-  if (ShouldEnterPushedState(event) && HitTestPoint(event.location())) {
+  if (state_ != STATE_PRESSED && ShouldEnterPushedState(event) &&
+      HitTestPoint(event.location())) {
     SetState(STATE_PRESSED);
     if (ink_drop_delegate_)
       ink_drop_delegate_->OnAction(views::InkDropState::ACTION_PENDING);
   }
   if (request_focus_on_press_)
     RequestFocus();
   if (IsTriggerableEvent(event) && notify_action_ == NOTIFY_ON_PRESS) {
     NotifyClick(event);
     // NOTE: We may be deleted at this point (by the listener's notification
     // handler).
@@ skipping 300 matching lines @@
   return GetWidget() && GetWidget()->GetTopLevelWidget() != GetWidget();
 }
 
 bool CustomButton::FocusInChildWidget() const {
   return GetWidget() &&
          GetWidget()->GetRootView()->Contains(
              GetFocusManager()->GetFocusedView());
 }
 
 }  // namespace views