[VrShell] Centralize color handling and enable close button on fullscreen

chrome/browser/android/vr_shell/textures/loading_indicator_texture.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/textures/loading_indicator_texture.h"
 
 #include "base/logging.h"
 #include "cc/paint/skia_paint_canvas.h"
 #include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkColor.h"
 
 namespace vr_shell {
 
 namespace {
 
-static constexpr SkColor kBackground = 0xFF8C8C8C;
-static constexpr SkColor kForeground = 0xFF333333;
 static constexpr float kWidth = 0.24;
 static constexpr float kHeight = 0.008;
 
 }  // namespace
 
 LoadingIndicatorTexture::LoadingIndicatorTexture() = default;
 
 LoadingIndicatorTexture::~LoadingIndicatorTexture() = default;
 
 gfx::Size LoadingIndicatorTexture::GetPreferredTextureSize(
@@ skipping 23 matching lines @@
 
 void LoadingIndicatorTexture::Draw(SkCanvas* canvas,
                                    const gfx::Size& texture_size) {
   size_.set_height(texture_size.height());
   size_.set_width(texture_size.width());
 
   canvas->save();
   canvas->scale(size_.width() / kWidth, size_.width() / kWidth);
 
   SkPaint paint;
-  paint.setColor(kBackground);
+  paint.setColor(color_scheme().loading_indicator_background);
   canvas->drawRoundRect({0, 0, kWidth, kHeight}, kHeight / 2, kHeight / 2,
                         paint);
 
   if (loading_) {
-    paint.setColor(kForeground);
+    paint.setColor(color_scheme().loading_indicator_foreground);
     float progress_width = kHeight + (kWidth - kHeight) * progress_;
     canvas->drawRoundRect({0, 0, progress_width, kHeight}, kHeight / 2,
                           kHeight / 2, paint);
   }
 
   canvas->restore();
 }
 
 }  // namespace vr_shell