[autofill] Add support for PSL domain matching for password autofill.

components/autofill/common/password_form_fill_data.cc

Index: components/autofill/common/password_form_fill_data.cc
diff --git a/components/autofill/common/password_form_fill_data.cc b/components/autofill/common/password_form_fill_data.cc
index 99e089e5708990ae0e3777d42ad6f23ff5d46b9c..637d3f2064ac002d9cf7aea9b0826dbe9fee386e 100644
--- a/components/autofill/common/password_form_fill_data.cc
+++ b/components/autofill/common/password_form_fill_data.cc
@@ -5,6 +5,7 @@
 #include "components/autofill/common/password_form_fill_data.h"
 
 #include "base/logging.h"
+#include "base/utf_string_conversions.h"
 #include "components/autofill/common/form_field_data.h"
 
 namespace autofill {
@@ -51,11 +52,25 @@ void InitPasswordFormFillData(
   result->basic_data.fields.push_back(password_field);
   result->wait_for_username = wait_for_username_before_autofill;
 
+  if (preferred_match->original_signon_realm.empty()) {
+    result->preferred_realm = ASCIIToUTF16(preferred_match->signon_realm);
+  } else {
+    result->preferred_realm =
+        ASCIIToUTF16(preferred_match->original_signon_realm);
+  }
+
   // Copy additional username/value pairs.
   content::PasswordFormMap::const_iterator iter;
   for (iter = matches.begin(); iter != matches.end(); iter++) {
-    if (iter->second != preferred_match)
-      result->additional_logins[iter->first] = iter->second->password_value;
+    if (iter->second != preferred_match) {
+      PasswordAndRealm value;
+      value.password = iter->second->password_value;
+      if (iter->second->original_signon_realm.empty())
+        value.realm = ASCIIToUTF16(iter->second->signon_realm);
+      else
+        value.realm = ASCIIToUTF16(iter->second->original_signon_realm);
+      result->additional_logins[iter->first] = value;
+    }
     if (enable_other_possible_usernames &&
         !iter->second->other_possible_usernames.empty()) {
       // Note that there may be overlap between other_possible_usernames and