Remove usages of XInternAtom

ui/platform_window/x11/x11_window_base.h

 // 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 UI_PLATFORM_WINDOW_X11_X11_WINDOW_BASE_H_
 #define UI_PLATFORM_WINDOW_X11_X11_WINDOW_BASE_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/x/x11_atom_cache.h"
 #include "ui/gfx/x/x11_types.h"
 #include "ui/platform_window/platform_window.h"
 #include "ui/platform_window/platform_window_delegate.h"
 #include "ui/platform_window/x11/x11_window_export.h"
 
 namespace ui {
 
 class XScopedEventSelector;
 
 // Abstract base implementation for a X11 based PlatformWindow. Methods that
@@ skipping 35 matching lines @@
 
   // Processes events for this XWindow.
   void ProcessXWindowEvent(XEvent* xev);
 
  private:
   PlatformWindowDelegate* delegate_;
 
   XDisplay* xdisplay_;
   XID xwindow_;
   XID xroot_window_;
-  X11AtomCache atom_cache_;
   std::unique_ptr<ui::XScopedEventSelector> xwindow_events_;
 
   base::string16 window_title_;
 
   // The bounds of |xwindow_|.
   gfx::Rect bounds_;
 
   bool window_mapped_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(X11WindowBase);
 };
 
 }  // namespace ui
 
 #endif  // UI_PLATFORM_WINDOW_X11_X11_WINDOW_BASE_H_