Remove X11/Xlib.h include from selection_requestor.h

ui/gfx/x/x11_atom_cache.h

Index: ui/gfx/x/x11_atom_cache.h
diff --git a/ui/gfx/x/x11_atom_cache.h b/ui/gfx/x/x11_atom_cache.h
index 6a29df720c6fec9bd54f90b5c8d5e3daec287d30..92d4db799b06ed8912248bee025a30306ee459c0 100644
--- a/ui/gfx/x/x11_atom_cache.h
+++ b/ui/gfx/x/x11_atom_cache.h
@@ -10,9 +10,7 @@
 
 #include "base/basictypes.h"
 #include "ui/gfx/gfx_export.h"
-
-typedef unsigned long Atom;
-typedef struct _XDisplay XDisplay;
+#include "ui/gfx/x/x11_types.h"
 
 namespace ui {
 
@@ -27,7 +25,7 @@ class GFX_EXPORT X11AtomCache {
   ~X11AtomCache();
 
   // Returns the pre-interned Atom without having to go to the x server.
-  Atom GetAtom(const char*) const;
+  XAtom GetAtom(const char*) const;
 
   // When an Atom isn't in the list of items we've cached, we should look it
   // up, cache it locally, and then return the result.
@@ -38,7 +36,7 @@ class GFX_EXPORT X11AtomCache {
 
   bool uncached_atoms_allowed_;
 
-  mutable std::map<std::string, Atom> cached_atoms_;
+  mutable std::map<std::string, XAtom> cached_atoms_;
 
   DISALLOW_COPY_AND_ASSIGN(X11AtomCache);
 };