NOT FOR REVIEW - convert to cc animation

chrome/browser/android/vr_shell/ui_elements/screen_dimmer.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/screen_dimmer.h"
 
 #include "chrome/browser/android/vr_shell/color_scheme.h"
 #include "chrome/browser/android/vr_shell/ui_element_renderer.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/geometry/quaternion.h"
 #include "ui/gfx/transform.h"
 
 namespace vr_shell {
 
 namespace {
 static const float kDimmerOpacity = 0.9f;
 }  // namespace
 
-ScreenDimmer::ScreenDimmer() {}
+ScreenDimmer::ScreenDimmer(int id) : UiElement(id) {}
 
 ScreenDimmer::~ScreenDimmer() = default;
 
 void ScreenDimmer::Initialize() {
   set_fill(Fill::SELF);
 }
 
 void ScreenDimmer::Render(UiElementRenderer* renderer,
                           gfx::Transform view_proj_matrix) const {
   gfx::Transform m;
   m.Scale3d(2.0f, 2.0f, 1.0f);
 
   // Always use normal scheme for dimmer.
   const ColorScheme& color_scheme =
       ColorScheme::GetColorScheme(ColorScheme::kModeNormal);
   renderer->DrawGradientQuad(m, color_scheme.dimmer_outer,
                              color_scheme.dimmer_inner, kDimmerOpacity);
 }
 
 }  // namespace vr_shell