Add VR gradient and grid background to non-WebVR scene.

chrome/browser/android/vr_shell/ui_scene.cc

 // Copyright 2016 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.h"
 
 #include <string>
 #include <utility>
 
 #include "base/memory/ptr_util.h"
@@ skipping 128 matching lines @@
       elements.push_back(element.get());
     }
   }
   return elements;
 }
 
 bool UiScene::HasVisibleHeadLockedElements() const {
   return !GetHeadLockedElements().empty();
 }
 
+void UiScene::SetBackgroundColor(const vr::Colorf& color) {
+  background_color_ = color;
+}
+
 const vr::Colorf& UiScene::GetBackgroundColor() const {
   return background_color_;
 }
 
+void UiScene::SetBackgroundDistance(float distance) {
+  background_distance_ = distance;
+}
+
 float UiScene::GetBackgroundDistance() const {
   return background_distance_;
 }
 
 bool UiScene::GetWebVrRenderingEnabled() const {
   return webvr_rendering_enabled_;
 }
 
 const std::vector<std::unique_ptr<UiElement>>& UiScene::GetUiElements() const {
   return ui_elements_;
@@ skipping 44 matching lines @@
 
 // TODO(mthiesse): Move this to UiSceneManager.
 void UiScene::OnGLInitialized() {
   gl_initialized_ = true;
   for (const std::unique_ptr<UiElement>& element : ui_elements_) {
     element->Initialize();
   }
 }
 
 }  // namespace vr_shell