x11: Use scoped_ptr<> for X11 objects where it makes sense.

ui/base/ime/chromeos/ime_keyboard_x11.cc

 // Copyright 2014 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/base/ime/chromeos/ime_keyboard_x11.h"
 
 #include <X11/XKBlib.h>
 #include <X11/Xlib.h>
 
 #include "ui/gfx/x/x11_types.h"
@@ skipping 66 matching lines @@
   unsigned int real_mask = kBadMask;
   XkbDescPtr xkb_desc =
       XkbGetKeyboard(gfx::GetXDisplay(), XkbAllComponentsMask, XkbUseCoreKbd);
   if (!xkb_desc)
     return kBadMask;
 
   if (xkb_desc->dpy && xkb_desc->names) {
     const std::string string_to_find(kNumLockVirtualModifierString);
     for (size_t i = 0; i < XkbNumVirtualMods; ++i) {
       const unsigned int virtual_mod_mask = 1U << i;
-      char* virtual_mod_str_raw_ptr =
-          XGetAtomName(xkb_desc->dpy, xkb_desc->names->vmods[i]);
+      gfx::XScopedPtr<char> virtual_mod_str_raw_ptr(
+          XGetAtomName(xkb_desc->dpy, xkb_desc->names->vmods[i]));
       if (!virtual_mod_str_raw_ptr)
         continue;
-      const std::string virtual_mod_str = virtual_mod_str_raw_ptr;
-      XFree(virtual_mod_str_raw_ptr);
+      const std::string virtual_mod_str = virtual_mod_str_raw_ptr.get();
 
       if (string_to_find == virtual_mod_str) {
         if (!XkbVirtualModsToReal(xkb_desc, virtual_mod_mask, &real_mask)) {
           DVLOG(1) << "XkbVirtualModsToReal failed";
           real_mask = kBadMask;  // reset the return value, just in case.
         }
         break;
       }
     }
   }
@@ skipping 193 matching lines @@
   return CheckLayoutName(layout_name);
 }
 
 // static
 ImeKeyboard* ImeKeyboard::Create() {
   return new ImeKeyboardX11();
 }
 
 }  // namespace input_method
 }  // namespace chromeos