[Password manager] Temporarily add some CHECKs to investigate a crash

components/autofill/core/common/password_form.h

Index: components/autofill/core/common/password_form.h
diff --git a/components/autofill/core/common/password_form.h b/components/autofill/core/common/password_form.h
index c6d7448e3fe3ea3f7e0fe12cfa04905f7518d020..96633264b01e32a407cdf3e9d150ee763faad6f0 100644
--- a/components/autofill/core/common/password_form.h
+++ b/components/autofill/core/common/password_form.h
@@ -265,6 +265,9 @@ struct PasswordForm {
   // If true, this form was parsed using Autofill predictions.
   bool was_parsed_using_autofill_predictions;
 
+  // TODO(vabr): Remove |is_alive| once http://crbug.com/486931 is fixed.
+  bool is_alive;  // Set on construction, reset on destruction.
+
   // Returns true if this match was found using public suffix matching.
   bool IsPublicSuffixMatch() const;