Migrate Libsecret for OSCrypt to a new schema

components/os_crypt/key_storage_libsecret.h

Index: components/os_crypt/key_storage_libsecret.h
diff --git a/components/os_crypt/key_storage_libsecret.h b/components/os_crypt/key_storage_libsecret.h
index 2560b5440bbdb2c3a23394a58583b0bdd4d7fbc4..42ce9731cbec0050a4ff0e55ffdee92d48b79232 100644
--- a/components/os_crypt/key_storage_libsecret.h
+++ b/components/os_crypt/key_storage_libsecret.h
@@ -26,6 +26,12 @@ class KeyStorageLibsecret : public KeyStorageLinux {
  private:
   std::string AddRandomPasswordInLibsecret();
 
+  // TODO(crbug/639298) We begun storing passwords with a problematic schema.

[Lei Zhang, 2016/08/26 21:33:56]

How about something like:

Older Chromium releases stored passwords with a problematic schema. Detect
password entries with the old schema and migrate them to the new schema. Returns
the migrated password or an empty string if none were migrated.

[Lei Zhang, 2016/08/26 21:33:56]

Can you put crbug.com so one can more easily paste it into the omnibox?

[cfroussios, 2016/08/29 09:58:42]

Done.

[cfroussios, 2016/08/29 09:58:42]

Done.

+  // Here, we detect entries with the old schema and migrate them to the new
+  // schema.
+  // Returns the migrated password or an empty string if none we migrated.
+  std::string Migrate();
+
   DISALLOW_COPY_AND_ASSIGN(KeyStorageLibsecret);
 };