Aura/ash split: Don't use X11 window borders.

ui/aura/root_window_host_linux.h

 // Copyright (c) 2012 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 UI_AURA_ROOT_WINDOW_HOST_LINUX_H_
 #define UI_AURA_ROOT_WINDOW_HOST_LINUX_H_
 #pragma once
 
 #include <X11/Xlib.h>
 
@@ skipping 64 matching lines @@
 
   // Is the cursor currently shown?
   bool cursor_shown_;
 
   // The invisible cursor.
   ::Cursor invisible_cursor_;
 
   // The bounds of |xwindow_|.
   gfx::Rect bounds_;
 
-  // Names of cached atoms that we fetch during the constructor to minimize
-  // round trips to the X11 server.
-  enum AtomList {
-    ATOM_WM_DELETE_WINDOW = 0,
-    ATOM__NET_WM_PING,
-    ATOM__NET_WM_PID,
-    ATOM_WM_S0,
-
-    ATOM_COUNT
-  };
-  ::Atom cached_atoms_[ATOM_COUNT];
-
   // True if the window should be focused when the window is shown.
   bool focus_when_shown_;
 
   scoped_array<XID> pointer_barriers_;
 
   scoped_ptr<ui::ViewProp> prop_;
 
   class ImageCursors;
   scoped_ptr<ImageCursors> image_cursors_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindowHostLinux);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_HOST_LINUX_H_