Move ui::GetAtom to gfx::GetAtom

ui/gfx/x/x11_atom_cache.cc

 // 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.
 
 #include "ui/gfx/x/x11_atom_cache.h"
 
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
 
 #include <memory>
@@ skipping 138 matching lines @@
                                "XdndLeave",
                                "XdndPosition",
                                "XdndProxy",
                                "XdndSelection",
                                "XdndStatus",
                                "XdndTypeList",
                                nullptr};
 
 }  // namespace
 
-namespace ui {
+namespace gfx {
+
+XAtom GetAtom(const char* name) {
+  return X11AtomCache::GetInstance()->GetAtom(name);
+}
 
 X11AtomCache* X11AtomCache::GetInstance() {
   return base::Singleton<X11AtomCache>::get();
 }
 
 X11AtomCache::X11AtomCache() : xdisplay_(gfx::GetXDisplay()) {
   int cache_count = 0;
   for (const char* const* i = kAtomsToCache; *i; ++i)
     ++cache_count;
 
@@ skipping 14 matching lines @@
 
   if (it == cached_atoms_.end()) {
     XAtom atom = XInternAtom(xdisplay_, name, false);
     cached_atoms_.insert(std::make_pair(name, atom));
     return atom;
   }
 
   return it->second;
 }
 
-}  // namespace ui
+}  // namespace gfx