NOT FOR REVIEW - convert to cc animation

chrome/browser/android/vr_shell/ui_elements/button.cc

 // Copyright 2017 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 "chrome/browser/android/vr_shell/ui_elements/button.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/android/vr_shell/textures/button_texture.h"
 #include "ui/gfx/geometry/point_f.h"
 
 namespace vr_shell {
 
-Button::Button(base::Callback<void()> click_handler,
+Button::Button(int id,
+               base::Callback<void()> click_handler,
                std::unique_ptr<ButtonTexture> texture)
-    : TexturedElement(256),
+    : TexturedElement(id, 256),
       texture_(std::move(texture)),
       click_handler_(click_handler) {}
 
 Button::~Button() = default;
 
 void Button::OnHoverEnter(const gfx::PointF& position) {
   OnStateUpdated(position);
 }
 
 void Button::OnHoverLeave() {
@@ skipping 28 matching lines @@
 void Button::OnStateUpdated(const gfx::PointF& position) {
   const bool hovered = HitTest(position);
   const bool pressed = hovered ? down_ : false;
 
   texture_->SetHovered(hovered);
   texture_->SetPressed(pressed);
   UpdateTexture();
 }
 
 }  // namespace vr_shell