Move XID, XDisplay, GetXDisplay and a few other types to ui/gfx/x/x11_types.h

ui/aura/root_window_host_x11.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_X11_H_
 #define UI_AURA_ROOT_WINDOW_HOST_X11_H_
 
 #include <X11/Xlib.h>
 
 #include <vector>
@@ skipping 85 matching lines @@
   // Update is_internal_display_ based on delegate_ state
   void UpdateIsInternalDisplay();
 
   // Set the CrOS touchpad "tap paused" property. It is used to temporarily
   // turn off the Tap-to-click feature when the mouse pointer is invisible.
   void SetCrOSTapPaused(bool state);
 
   RootWindowHostDelegate* delegate_;
 
   // The display and the native X window hosting the root window.
-  Display* xdisplay_;
+  XDisplay* xdisplay_;
   ::Window xwindow_;
 
   // The native root window.
   ::Window x_root_window_;
 
   // Current Aura cursor.
   gfx::NativeCursor current_cursor_;
 
   // Is the window mapped to the screen?
   bool window_mapped_;
@@ skipping 30 matching lines @@
 namespace test {
 
 // Set the default value of the override redirect flag used to
 // create a X window for RootWindowHostX11.
 AURA_EXPORT void SetUseOverrideRedirectWindowByDefault(bool override_redirect);
 
 }  // namespace test
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_HOST_X11_H_