Remove unused references to NativeTheme in TrayPopupItemStyle.

ash/common/system/tray/hover_highlight_view.cc

 // Copyright 2012 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/hover_highlight_view.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/system/tray/fixed_sized_image_view.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/system/tray/tray_popup_utils.h"
@@ skipping 187 matching lines @@
   AddChildView(tri_view_);
 
   left_icon_ = TrayPopupUtils::CreateMainImageView();
   left_icon_->SetImage(image);
   left_icon_->SetEnabled(enabled());
   tri_view_->AddView(TriView::Container::START, left_icon_);
 
   text_label_ = TrayPopupUtils::CreateDefaultLabel();
   text_label_->SetText(text);
   text_label_->SetEnabled(enabled());
-  TrayPopupItemStyle style(GetNativeTheme(), font_style);
+  TrayPopupItemStyle style(font_style);
   style.SetupLabel(text_label_);
 
   tri_view_->AddView(TriView::Container::CENTER, text_label_);
   if (!sub_text.empty()) {
     sub_text_label_ = TrayPopupUtils::CreateDefaultLabel();
     sub_text_label_->SetText(sub_text);
-    TrayPopupItemStyle sub_style(GetNativeTheme(),
-                                 TrayPopupItemStyle::FontStyle::CAPTION);
+    TrayPopupItemStyle sub_style(TrayPopupItemStyle::FontStyle::CAPTION);
     sub_style.set_color_style(TrayPopupItemStyle::ColorStyle::INACTIVE);
     sub_style.SetupLabel(sub_text_label_);
     tri_view_->AddView(TriView::Container::CENTER, sub_text_label_);
   }
 
   tri_view_->SetContainerVisible(TriView::Container::END, false);
 
   SetAccessibleName(text);
 }
 
@@ skipping 202 matching lines @@
 void HoverHighlightView::OnPaintBackground(gfx::Canvas* canvas) {
   canvas->DrawColor(hover_ ? highlight_color_ : default_color_);
 }
 
 void HoverHighlightView::OnFocus() {
   ScrollRectToVisible(gfx::Rect(gfx::Point(), size()));
   ActionableView::OnFocus();
 }
 
 }  // namespace ash