Introduce a type of View background that stays in sync with its host

ash/system/tray/tray_popup_utils.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 "ash/system/tray/tray_popup_utils.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "ash/ash_constants.h"
@@ skipping 193 matching lines @@
 }
 
 views::Label* TrayPopupUtils::CreateDefaultLabel() {
   views::Label* label = new views::Label();
   label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
   label->SetBorder(
       views::CreateEmptyBorder(0, 0, 0, kTrayPopupLabelRightPadding));
   // Frequently the label will paint to a layer that's non-opaque, so subpixel
   // rendering won't work unless we explicitly set a background. See
   // crbug.com/686363
-  label->set_background(
-      views::Background::CreateSolidBackground(kBackgroundColor));
-  label->SetBackgroundColor(kBackgroundColor);
+  label->set_background(views::Background::CreateThemedSolidBackground(
+      label, ui::NativeTheme::kColorId_BubbleBackground));
   return label;
 }
 
 views::ImageView* TrayPopupUtils::CreateMainImageView() {
   return new FixedSizedImageView(kTrayPopupItemMinStartWidth,
                                  kTrayPopupItemMinHeight);
 }
 
 views::ImageView* TrayPopupUtils::CreateMoreImageView() {
   views::ImageView* image =
@@ skipping 38 matching lines @@
   button->SetFocusForPlatform();
 
   button->SetInkDropMode(views::InkDropHostView::InkDropMode::ON);
   button->set_has_ink_drop_action_on_click(true);
   button->set_ink_drop_base_color(kTrayPopupInkDropBaseColor);
   button->set_ink_drop_visible_opacity(kTrayPopupInkDropRippleOpacity);
 }
 
 void TrayPopupUtils::ConfigureAsStickyHeader(views::View* view) {
   view->set_id(VIEW_ID_STICKY_HEADER);
-  view->set_background(
-      views::Background::CreateSolidBackground(kBackgroundColor));
+  view->set_background(views::Background::CreateThemedSolidBackground(
+      view, ui::NativeTheme::kColorId_BubbleBackground));
   view->SetBorder(
       views::CreateEmptyBorder(gfx::Insets(kMenuSeparatorVerticalPadding, 0)));
   view->SetPaintToLayer();
   view->layer()->SetFillsBoundsOpaquely(false);
 }
 
 void TrayPopupUtils::ShowStickyHeaderSeparator(views::View* view,
                                                bool show_separator) {
   if (show_separator) {
     view->SetBorder(views::CreatePaddedBorder(
@@ skipping 159 matching lines @@
 
 void TrayPopupUtils::UpdateCheckMarkVisibility(HoverHighlightView* container,
                                                bool visible) {
   container->SetRightViewVisible(visible);
   container->SetAccessiblityState(
       visible ? HoverHighlightView::AccessibilityState::CHECKED_CHECKBOX
               : HoverHighlightView::AccessibilityState::UNCHECKED_CHECKBOX);
 }
 
 }  // namespace ash