CREDENTIAL: Disable auto sign-in by default for existing credentials.

chrome/browser/password_manager/native_backend_kwallet_x.cc

Index: chrome/browser/password_manager/native_backend_kwallet_x.cc
diff --git a/chrome/browser/password_manager/native_backend_kwallet_x.cc b/chrome/browser/password_manager/native_backend_kwallet_x.cc
index cf4668179a66b7598454e9209f7ca0cb2a309d5c..59bfc8472c27e8e0832d29b52eb2b06705d5688f 100644
--- a/chrome/browser/password_manager/native_backend_kwallet_x.cc
+++ b/chrome/browser/password_manager/native_backend_kwallet_x.cc
@@ -37,7 +37,7 @@ namespace {
 
 // In case the fields in the pickle ever change, version them so we can try to
 // read old pickles. (Note: do not eat old pickles past the expiration date.)
-const int kPickleVersion = 7;
+const int kPickleVersion = 8;
 
 // We could localize this string, but then changing your locale would cause
 // you to lose access to all your stored passwords. Maybe best not to do that.
@@ -244,6 +244,10 @@ bool DeserializeValueSize(const std::string& signon_realm,
       }
     }
 
+    if (version > 7) {
+      form->skip_zero_click = true;

[vasilii, 2016/02/26 11:46:30]

It's a bug. You read "true" always even if you save "false" later.
You should add something to NativeBackendKWalletPickleTest

[Mike West, 2016/02/26 12:29:34]

Yeah, I misunderstood what was going on here. Added a test.

+    }
+
     converted_forms.push_back(std::move(form));
   }