Add a dummy entry with libsecret when initializing OSCrypt.

components/os_crypt/libsecret_util_linux.h

Index: components/os_crypt/libsecret_util_linux.h
diff --git a/components/os_crypt/libsecret_util_linux.h b/components/os_crypt/libsecret_util_linux.h
index bb86f5140d9d2f6d8b66979adea78d8c11486faf..96f6b17d56e816d4a7ee97de53288000db8e1141 100644
--- a/components/os_crypt/libsecret_util_linux.h
+++ b/components/os_crypt/libsecret_util_linux.h
@@ -30,6 +30,10 @@ class LibsecretLoader {
   // the library again if already successful.
   static bool EnsureLibsecretLoaded();
 
+  // Ensure that the default keyring is accessible. This won't prevent the user
+  // from locking their keyring while Chrome is running.
+  static void EnsureKeyringUnlocked();
+
  protected:
   static bool libsecret_loaded_;