Remove unused references to NativeTheme in TrayPopupItemStyle.

ash/common/system/chromeos/network/vpn_list_view.cc

 // Copyright 2015 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/chromeos/network/vpn_list_view.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 106 matching lines @@
     SetLayoutManager(new views::FillLayout);
     TriView* tri_view = TrayPopupUtils::CreateSubHeaderRowView();
     AddChildView(tri_view);
 
     views::Label* label = TrayPopupUtils::CreateDefaultLabel();
     TrayPopupItemStyle style(TrayPopupItemStyle::FontStyle::SUB_HEADER);
     style.SetupLabel(label);
     label->SetText(base::ASCIIToUTF16(name));
     tri_view->AddView(TriView::Container::CENTER, label);
 
-    gfx::ImageSkia icon = gfx::CreateVectorIcon(kSystemMenuAddConnectionIcon,
-                                                style.GetIconColor());
+    const SkColor image_color = GetNativeTheme()->GetSystemColor(
+        ui::NativeTheme::kColorId_ProminentButtonColor);
+    gfx::ImageSkia icon =
+        gfx::CreateVectorIcon(kSystemMenuAddConnectionIcon, image_color);
     SystemMenuButton* add_vpn_button =
         new SystemMenuButton(this, TrayPopupInkDropStyle::HOST_CENTERED, icon,
                              icon, button_accessible_name_id);
-    add_vpn_button->SetInkDropColor(style.GetIconColor());
+    add_vpn_button->SetInkDropColor(image_color);
     add_vpn_button->SetEnabled(true);
     tri_view->AddView(TriView::Container::END, add_vpn_button);
   }
 
  protected:
   // views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override {
     parent_->OnViewClicked(this);
   }
 
@@ skipping 380 matching lines @@
     }
   }
 
   // Add providers without any configured networks, in the order that the
   // providers were returned by the extensions system.
   for (const VPNProvider& provider : providers)
     AddProviderAndNetworks(provider, networks);
 }
 
 }  // namespace ash