Revert of Added common layout framework for system menu rows.

ash/common/system/tray/tray_popup_layout_factory.h

Index: ash/common/system/tray/tray_popup_layout_factory.h
diff --git a/ash/common/system/tray/tray_popup_layout_factory.h b/ash/common/system/tray/tray_popup_layout_factory.h
deleted file mode 100644
index 5e5669eb93d48fe182ab829f34503c081505947d..0000000000000000000000000000000000000000
--- a/ash/common/system/tray/tray_popup_layout_factory.h
+++ /dev/null
@@ -1,55 +0,0 @@
-// 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.
-
-#ifndef ASH_COMMON_SYSTEM_TRAY_TRAY_POPUP_LAYOUT_FACTORY_H_
-#define ASH_COMMON_SYSTEM_TRAY_TRAY_POPUP_LAYOUT_FACTORY_H_
-
-#include <memory>
-
-#include "ash/common/system/tray/three_view_layout.h"
-#include "base/macros.h"
-
-namespace views {
-class View;
-}  // namespace views
-
-namespace ash {
-
-// Factory functions for system menu row layout managers.
-class TrayPopupLayoutFactory {
- public:
-  // Sets the layout manager of |host| to the default layout manager used by
-  // most system menu rows. The newly created layout manager is owned by the
-  // |host| but is returned so child Views can be added.
-  //
-  // The returned layout manager consists of 3 regions: START, CENTER, and END.
-  // Any child Views added to the START and END containers will be added
-  // horizonatlly and any Views added to the CENTER container will be added
-  // vertically.
-  //
-  // The START and END containers have a fixed width but can grow into the
-  // CENTER container if space is required and available.
-  //
-  // The CENTER container has a flexible width.
-  static ThreeViewLayout* InstallDefaultLayout(views::View* host);
-
-  // Configures the different |container| Views with the default layout
-  // managers.
-  //
-  // This can be used by clients who need to embed portions of the default
-  // layout manager into a different container view, e.g. just the END layout
-  // into a clickable View.
-  static void ConfigureDefaultLayout(ThreeViewLayout* layout,
-                                     ThreeViewLayout::Container container);
-
- private:
-  TrayPopupLayoutFactory();
-  ~TrayPopupLayoutFactory();
-
-  DISALLOW_COPY_AND_ASSIGN(TrayPopupLayoutFactory);
-};
-
-}  // namespace ash
-
-#endif  // ASH_COMMON_SYSTEM_TRAY_TRAY_POPUP_LAYOUT_FACTORY_H_