Remove unused references to NativeTheme in TrayPopupItemStyle.

ash/common/system/chromeos/ime_menu/ime_menu_tray.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/chromeos/ime_menu/ime_menu_tray.h"
 
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/ash_constants.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/session/session_state_delegate.h"
@@ skipping 132 matching lines @@
   explicit ImeTitleView(bool show_settings_button) : settings_button_(nullptr) {
     SetBorder(views::CreatePaddedBorder(
         views::CreateSolidSidedBorder(0, 0, kSeparatorWidth, 0,
                                       kHorizontalSeparatorColor),
         gfx::Insets(kMenuSeparatorVerticalPadding - kSeparatorWidth, 0)));
     auto* box_layout =
         new views::BoxLayout(views::BoxLayout::kHorizontal, 0, 0, 0);
     box_layout->set_minimum_cross_axis_size(
         GetTrayConstant(TRAY_POPUP_ITEM_MIN_HEIGHT));
     SetLayoutManager(box_layout);
-    title_label_ =
+    auto title_label =
         new views::Label(l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_IME));
-    title_label_->SetBorder(views::CreateEmptyBorder(
+    title_label->SetBorder(views::CreateEmptyBorder(
         0, kMenuEdgeEffectivePadding, kTrayMenuBottomRowPadding, 0));
-    UpdateStyle();
-    title_label_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
-    AddChildView(title_label_);
-    box_layout->SetFlexForView(title_label_, 1);
+    title_label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
+    TrayPopupItemStyle style(TrayPopupItemStyle::FontStyle::TITLE);
+    style.SetupLabel(title_label);
+
+    AddChildView(title_label);
+    box_layout->SetFlexForView(title_label, 1);
 
     if (show_settings_button) {
       settings_button_ = CreateImeMenuButton(
           this, kSystemMenuSettingsIcon, IDS_ASH_STATUS_TRAY_IME_SETTINGS, 0);
       if (IsInLoginOrLockScreen())
         settings_button_->SetEnabled(false);
       AddChildView(settings_button_);
     }
   }
 
-  void UpdateStyle() {
-    if (!GetNativeTheme() || !title_label_) {
-      return;
-    }
-
-    TrayPopupItemStyle style(GetNativeTheme(),
-                             TrayPopupItemStyle::FontStyle::TITLE);
-    style.SetupLabel(title_label_);
-  }
-
-  // views::View:
-  void OnNativeThemeChanged(const ui::NativeTheme* theme) override {
-    UpdateStyle();
-  }
-
   // views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override {
     DCHECK_EQ(sender, settings_button_);
     ShowIMESettings();
   }
 
   ~ImeTitleView() override {}
 
  private:
-  views::Label* title_label_;
-
   // Settings button that is only used in material design, and only if the
   // emoji, handwriting and voice buttons are not available.
   SystemMenuButton* settings_button_;
 
   DISALLOW_COPY_AND_ASSIGN(ImeTitleView);
 };
 
 // The view that contains buttons shown on the bottom of IME menu.
 class ImeButtonsView : public views::View,
                        public views::ButtonListener,
@@ skipping 470 matching lines @@
   WmShell::Get()->system_tray_delegate()->GetCurrentIME(&current_ime_);
 
   // Updates the tray label based on the current input method.
   if (current_ime_.third_party)
     label_->SetText(current_ime_.short_name + base::UTF8ToUTF16("*"));
   else
     label_->SetText(current_ime_.short_name);
 }
 
 }  // namespace ash