Remove old (dead) app list code.

ash/common/shelf/app_list_button.cc

 // Copyright 2014 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/shelf/app_list_button.h"
 
 #include "ash/common/ash_constants.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shelf/ink_drop_button_listener.h"
 #include "ash/common/shelf/shelf_constants.h"
@@ skipping 29 matching lines @@
       wm_shelf_(wm_shelf) {
   DCHECK(listener_);
   DCHECK(shelf_view_);
   DCHECK(wm_shelf_);
   if (ash::MaterialDesignController::IsShelfMaterial()) {
     SetInkDropMode(InkDropMode::ON_NO_GESTURE_HANDLER);
     set_ink_drop_base_color(kShelfInkDropBaseColor);
     set_ink_drop_visible_opacity(kShelfInkDropVisibleOpacity);
   }
   SetAccessibleName(
-      app_list::switches::IsExperimentalAppListEnabled()
-          ? l10n_util::GetStringUTF16(IDS_ASH_SHELF_APP_LIST_LAUNCHER_TITLE)
-          : l10n_util::GetStringUTF16(IDS_ASH_SHELF_APP_LIST_TITLE));
+      l10n_util::GetStringUTF16(IDS_ASH_SHELF_APP_LIST_LAUNCHER_TITLE));
   SetSize(
       gfx::Size(GetShelfConstant(SHELF_SIZE), GetShelfConstant(SHELF_SIZE)));
   SetFocusPainter(views::Painter::CreateSolidFocusPainter(
       kFocusBorderColor, gfx::Insets(1, 1, 1, 1)));
   set_notify_action(CustomButton::NOTIFY_ON_PRESS);
 }
 
 AppListButton::~AppListButton() {}
 
 void AppListButton::OnAppListShown() {
@@ skipping 219 matching lines @@
 }
 
 void AppListButton::SetDrawBackgroundAsActive(bool draw_background_as_active) {
   if (draw_background_as_active_ == draw_background_as_active)
     return;
   draw_background_as_active_ = draw_background_as_active;
   SchedulePaint();
 }
 
 }  // namespace ash