Replace a few typeofs with delctype.

chrome/browser/password_manager/native_backend_gnome_x.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 CHROME_BROWSER_PASSWORD_MANAGER_NATIVE_BACKEND_GNOME_X_H_
 #define CHROME_BROWSER_PASSWORD_MANAGER_NATIVE_BACKEND_GNOME_X_H_
 
 // libgnome-keyring has been deprecated in favor of libsecret.
 // See: https://mail.gnome.org/archives/commits-list/2013-October/msg08876.html
 //
@@ skipping 43 matching lines @@
   F(attribute_list_free)                           \
   F(attribute_list_new)                            \
   F(attribute_list_append_string)                  \
   F(attribute_list_append_uint32)
 #define GNOME_KEYRING_FOR_EACH_FUNC(F)             \
   GNOME_KEYRING_FOR_EACH_NON_MOCKED_FUNC(F)        \
   GNOME_KEYRING_FOR_EACH_MOCKED_FUNC(F)
 
 // Declare the actual function pointers that we'll use in client code.
 #define GNOME_KEYRING_DECLARE_POINTER(name) \
-    static typeof(&::gnome_keyring_##name) gnome_keyring_##name;
+    static decltype(&::gnome_keyring_##name) gnome_keyring_##name;
   GNOME_KEYRING_FOR_EACH_FUNC(GNOME_KEYRING_DECLARE_POINTER)
 #undef GNOME_KEYRING_DECLARE_POINTER
 
   // Set to true if LoadGnomeKeyring() has already succeeded.
   static bool keyring_loaded;
 
  private:
 #if defined(DLOPEN_GNOME_KEYRING)
   struct FunctionInfo {
     const char* name;
@@ skipping 69 matching lines @@
   // The local profile id, used to generate the app string.
   const LocalProfileId profile_id_;
 
   // The app string, possibly based on the local profile id.
   std::string app_string_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeBackendGnome);
 };
 
 #endif  // CHROME_BROWSER_PASSWORD_MANAGER_NATIVE_BACKEND_GNOME_X_H_