Revert of third_party: Update to version 8 of remote_shell_protocol

components/exo/shell_surface.h

 // Copyright 2015 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 COMPONENTS_EXO_SHELL_SURFACE_H_
 #define COMPONENTS_EXO_SHELL_SURFACE_H_
 
 #include <deque>
 #include <memory>
 #include <string>
@@ skipping 97 matching lines @@
 
   // Set fullscreen state for shell surface.
   void SetFullscreen(bool fullscreen);
 
   // Pins the shell surface.
   void SetPinned(bool pinned);
 
   // Set title for surface.
   void SetTitle(const base::string16& title);
 
-  // Sets the system modality.
-  void SetSystemModal(bool system_modal);
-
   // Sets the application ID for the window. The application ID identifies the
   // general class of applications to which the window belongs.
   static void SetApplicationId(aura::Window* window,
                                std::string* application_id);
   static const std::string GetApplicationId(aura::Window* window);
 
   // Set application id for surface.
   void SetApplicationId(const std::string& application_id);
 
   // Start an interactive move of surface.
@@ skipping 157 matching lines @@
   std::unique_ptr<ScopedAnimationsDisabled> scoped_animations_disabled_;
   int top_inset_height_ = 0;
   int pending_top_inset_height_ = 0;
 
   DISALLOW_COPY_AND_ASSIGN(ShellSurface);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_SHELL_SURFACE_H_