Update a11y of volume row in CrOS system menu.

ash/common/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/common/system/tray/tray_popup_utils.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "ash/common/ash_constants.h"
 #include "ash/common/ash_view_ids.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/system/tray/fixed_sized_image_view.h"
 #include "ash/common/system/tray/size_range_layout.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/system/tray/tray_popup_item_style.h"
 #include "ash/common/wm_shell.h"
+#include "ash/resources/vector_icons/vector_icons.h"
 #include "base/memory/ptr_util.h"
 #include "ui/base/l10n/l10n_util.h"
+#include "ui/gfx/paint_vector_icon.h"
 #include "ui/views/animation/flood_fill_ink_drop_ripple.h"
 #include "ui/views/animation/ink_drop_highlight.h"
 #include "ui/views/animation/ink_drop_impl.h"
 #include "ui/views/animation/ink_drop_mask.h"
 #include "ui/views/animation/square_ink_drop_ripple.h"
 #include "ui/views/background.h"
 #include "ui/views/border.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/button/md_text_button.h"
@@ skipping 188 matching lines @@
   return new FixedSizedImageView(
       GetTrayConstant(TRAY_POPUP_ITEM_MAIN_IMAGE_CONTAINER_WIDTH),
       GetTrayConstant(TRAY_POPUP_ITEM_MIN_HEIGHT));
 }
 
 views::ImageView* TrayPopupUtils::CreateMoreImageView() {
   views::ImageView* image =
       new FixedSizedImageView(GetTrayConstant(TRAY_POPUP_ITEM_MORE_IMAGE_SIZE),
                               GetTrayConstant(TRAY_POPUP_ITEM_MORE_IMAGE_SIZE));
   image->EnableCanvasFlippingForRTLUI(true);
+  image->SetImage(
+      gfx::CreateVectorIcon(kSystemMenuArrowRightIcon, kMenuIconColor));
   return image;
 }
 
 views::Slider* TrayPopupUtils::CreateSlider(views::SliderListener* listener) {
   views::Slider* slider = new views::Slider(listener);
   slider->SetBorder(views::CreateEmptyBorder(gfx::Insets(0, 16)));
   return slider;
 }
 
 views::ToggleButton* TrayPopupUtils::CreateToggleButton(
@@ skipping 189 matching lines @@
 bool TrayPopupUtils::CanOpenWebUISettings(LoginStatus status) {
   // TODO(tdanderson): Consider moving this into WmShell, or introduce a
   // CanShowSettings() method in each delegate type that has a
   // ShowSettings() method.
   return status != LoginStatus::NOT_LOGGED_IN &&
          status != LoginStatus::LOCKED &&
          !WmShell::Get()->GetSessionStateDelegate()->IsInSecondaryLoginScreen();
 }
 
 }  // namespace ash