Fix a couple issues with sticky headers

ash/common/system/chromeos/ime_menu/ime_list_view.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_list_view.h"
 
-#include "ash/common/ash_view_ids.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/system/tray/hover_highlight_view.h"
 #include "ash/common/system/tray/ime_info.h"
 #include "ash/common/system/tray/system_menu_button.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/system/tray/tray_details_view.h"
 #include "ash/common/system/tray/tray_popup_header_button.h"
 #include "ash/common/system/tray/tray_popup_item_style.h"
 #include "ash/common/system/tray/tray_popup_utils.h"
@@ skipping 178 matching lines @@
   int GetHeightForWidth(int w) const override {
     return GetPreferredSize().height();
   }
 
   void OnNativeThemeChanged(const ui::NativeTheme* theme) override {
     UpdateStyle();
   }
 
  private:
   void Init() {
+    TrayPopupUtils::ConfigureAsStickyHeader(this);
     SetLayoutManager(new views::FillLayout);
-    set_background(views::Background::CreateSolidBackground(kBackgroundColor));
 
     TriView* tri_view = TrayPopupUtils::CreateDefaultRowView();
     AddChildView(tri_view);
 
     // The on-screen keyboard image button.
     views::ImageView* keyboard_image = TrayPopupUtils::CreateMainImageView();
     keyboard_image->SetImage(gfx::CreateVectorIcon(
         kImeMenuOnScreenKeyboardIcon, kMenuIconSize, kMenuIconColor));
     tri_view->AddView(TriView::Container::START, keyboard_image);
 
     // The on-screen keyboard label.
     label_ = TrayPopupUtils::CreateDefaultLabel();
     label_->SetText(ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
         IDS_ASH_STATUS_TRAY_ACCESSIBILITY_VIRTUAL_KEYBOARD));
     UpdateStyle();
     tri_view->AddView(TriView::Container::CENTER, label_);
 
     // The on-screen keyboard toggle button.
     toggle_ = new views::ToggleButton(listener_);
     toggle_->SetFocusForPlatform();
     toggle_->SetTooltipText(
         ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
             IDS_ASH_STATUS_TRAY_ACCESSIBILITY_VIRTUAL_KEYBOARD));
     tri_view->AddView(TriView::Container::END, toggle_);
-
-    set_id(VIEW_ID_STICKY_HEADER);
   }
 
   // Updates the style of |label_| based on the current native theme.
   void UpdateStyle() {
     TrayPopupItemStyle style(
         GetNativeTheme(), TrayPopupItemStyle::FontStyle::DETAILED_VIEW_LABEL);
     style.SetupLabel(label_);
   }
 
   // ButtonListener to notify when |toggle_| is clicked.
@@ skipping 167 matching lines @@
 }
 
 void ImeListView::HandleButtonPressed(views::Button* sender,
                                       const ui::Event& event) {
   DCHECK(material_keyboard_status_view_);
   DCHECK_EQ(sender, material_keyboard_status_view_->toggle());
   WmShell::Get()->ToggleIgnoreExternalKeyboard();
 }
 
 }  // namespace ash