Fix some memory leaks.

chrome/browser/chromeos/input_method/xkeyboard.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 "chrome/browser/chromeos/input_method/xkeyboard.h"
 
 #include <cstdlib>
 #include <cstring>
 #include <queue>
 #include <set>
@@ skipping 246 matching lines @@
   XkbDescPtr xkb_desc =
       XkbGetKeyboard(ui::GetXDisplay(), XkbAllComponentsMask, XkbUseCoreKbd);
   if (!xkb_desc) {
     return kBadMask;
   }
 
   if (xkb_desc->dpy && xkb_desc->names && xkb_desc->names->vmods) {
     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 =
-          XGetAtomName(xkb_desc->dpy, xkb_desc->names->vmods[i]);
-      if (!virtual_mod_str) {
+      ui::XScopedString virtual_mod_str(
+          XGetAtomName(xkb_desc->dpy, xkb_desc->names->vmods[i]));
+      if (!virtual_mod_str.string())
         continue;
-      }
-      if (string_to_find == virtual_mod_str) {
+      if (string_to_find == virtual_mod_str.string()) {
         if (!XkbVirtualModsToReal(xkb_desc, virtual_mod_mask, &real_mask)) {
           LOG(ERROR) << "XkbVirtualModsToReal failed";
           real_mask = kBadMask;  // reset the return value, just in case.
         }
-        XFree(virtual_mod_str);
         break;
       }
-      XFree(virtual_mod_str);
     }
   }
   XkbFreeKeyboard(xkb_desc, 0, True /* free all components */);
   return real_mask;
 }
 
 void XKeyboardImpl::GetLockedModifiers(bool* out_caps_lock_enabled,
                                        bool* out_num_lock_enabled) {
   // For now, don't call CHECK() here to make
   // TabRestoreServiceTest.DontRestorePrintPreviewTab test happy.
@@ skipping 265 matching lines @@
   return false;
 }
 
 // static
 XKeyboard* XKeyboard::Create(const InputMethodUtil& util) {
   return new XKeyboardImpl(util);
 }
 
 }  // namespace input_method
 }  // namespace chromeos