[vr] Migrate from vr::Colorf to SkColor

chrome/browser/android/vr_shell/ui_scene_manager.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_scene_manager.h"
 
 #include "base/callback.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/android/vr_shell/color_scheme.h"
 #include "chrome/browser/android/vr_shell/textures/close_button_texture.h"
@@ skipping 346 matching lines @@
                                 -kBackgroundDistanceMultiplier);
 }
 
 void UiSceneManager::UpdateBackgroundColor() {
   scene_->SetBackgroundColor(color_scheme().horizon);
   ceiling_->set_center_color(color_scheme().ceiling);
   ceiling_->set_edge_color(color_scheme().horizon);
   floor_->set_center_color(color_scheme().floor);
   floor_->set_edge_color(color_scheme().horizon);
   floor_grid_->set_center_color(color_scheme().floor_grid);
-  vr::Colorf floor_grid_edge_color = color_scheme().floor_grid;
-  floor_grid_edge_color.a = 0.0;
+  SkColor floor_grid_edge_color = SkColorSetA(color_scheme().floor_grid, 0);
   floor_grid_->set_edge_color(floor_grid_edge_color);
 }
 
 void UiSceneManager::SetAudioCapturingIndicator(bool enabled) {
   audio_capturing_ = enabled;
   audio_capture_indicator_->set_visible(enabled && !web_vr_mode_);
 }
 
 void UiSceneManager::SetVideoCapturingIndicator(bool enabled) {
   video_capturing_ = enabled;
@@ skipping 80 matching lines @@
 int UiSceneManager::AllocateId() {
   return next_available_id_++;
 }
 
 const ColorScheme& UiSceneManager::color_scheme() const {
   return ColorScheme::GetColorScheme(fullscreen_ ? ColorScheme::kModeFullscreen
                                                  : ColorScheme::kModeNormal);
 }
 
 }  // namespace vr_shell