Remove obsolete app_list Linux code.

chrome/browser/ui/app_list/app_list_shower_views.h

-// 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.
-
-#ifndef CHROME_BROWSER_UI_APP_LIST_APP_LIST_SHOWER_VIEWS_H_
-#define CHROME_BROWSER_UI_APP_LIST_APP_LIST_SHOWER_VIEWS_H_
-
-#include <memory>
-
-#include "base/macros.h"
-#include "ui/gfx/native_widget_types.h"
-
-namespace app_list {
-class AppListView;
-}
-
-class AppListShowerDelegate;
-class AppListShowerUnitTest;
-class Profile;
-class ScopedKeepAlive;
-
-// Creates and shows an AppList as needed for non-Ash desktops. It is owned by
-// AppListServiceViews.
-class AppListShower {
- public:
-  explicit AppListShower(AppListShowerDelegate* delegate);
-  virtual ~AppListShower();
-
-  void ShowForCurrentProfile();
-  gfx::NativeWindow GetWindow();
-
-  app_list::AppListView* app_list() { return app_list_; }
-  Profile* profile() const { return profile_; }
-
-  // Create or recreate, and initialize |app_list_| from |requested_profile|.
-  void CreateViewForProfile(Profile* requested_profile);
-
-  void DismissAppList();
-
-  // Virtual functions mocked out in tests.
-  virtual void HandleViewBeingDestroyed();
-  virtual bool IsAppListVisible() const;
-  virtual bool HasView() const;
-
- protected:
-  virtual app_list::AppListView* MakeViewForCurrentProfile();
-  virtual void UpdateViewForNewProfile();
-
-  // Shows the app list, activates it, and ensures the taskbar icon is updated.
-  virtual void Show();
-  virtual void Hide();
-
- private:
-  friend class ::AppListShowerUnitTest;
-
-  void ResetKeepAliveSoon();
-  void ResetKeepAlive();
-
-  AppListShowerDelegate* delegate_;  // Weak. Owns this.
-
-  // The profile currently shown by |app_list_|.
-  Profile* profile_;
-
-  // The view, once created. Owned by native widget.
-  app_list::AppListView* app_list_;
-
-  // Used to keep the browser process alive while the app list is visible.
-  std::unique_ptr<ScopedKeepAlive> keep_alive_;
-
-  bool window_icon_updated_;
-
-  DISALLOW_COPY_AND_ASSIGN(AppListShower);
-};
-
-#endif  // CHROME_BROWSER_UI_APP_LIST_APP_LIST_SHOWER_VIEWS_H_