Save password without an associated username.

chrome/renderer/autofill/password_autofill_manager.cc

Index: chrome/renderer/autofill/password_autofill_manager.cc
===================================================================
--- chrome/renderer/autofill/password_autofill_manager.cc	(revision 133421)
+++ chrome/renderer/autofill/password_autofill_manager.cc	(working copy)
@@ -196,6 +196,25 @@
   return StartsWith(username1, username2, true);
 }
 
+// Get whether fill_data has a username or not.
+bool HasUsernameField(const webkit::forms::PasswordFormFillData& fill_data) {
+  return fill_data.basic_data.fields.size() == 2;
+}
+
+// Get the username field from fill_data.
+// If it hasn't any username, calls NOTREACHED().
+const webkit::forms::FormField& GetUsernameField(
+  const webkit::forms::PasswordFormFillData& fill_data) {
+  DCHECK(HasUsernameField(fill_data));
+  return fill_data.basic_data.fields[1];
+}
+
+// Get the password field from fill_data.
+const webkit::forms::FormField& GetPasswordField(
+  const webkit::forms::PasswordFormFillData& fill_data) {
+  DCHECK(!fill_data.basic_data.fields.empty());
+  return fill_data.basic_data.fields[0];
+}
 }  // namespace
 
 namespace autofill {
@@ -448,15 +467,20 @@
     if (!form_data.wait_for_username)
       FillForm(form_elements.get(), form_data.basic_data);
 
+    // If there isn't any username, go to next iteration.
+    if (!HasUsernameField(form_data))
+      continue;
+
+    // If there is a username, set the username and login_to_password_info_.
     // Attach autocomplete listener to enable selecting alternate logins.
     // First, get pointers to username element.
     WebKit::WebInputElement username_element =
-        form_elements->input_elements[form_data.basic_data.fields[0].name];
+        form_elements->input_elements[GetUsernameField(form_data).name];
 
     // Get pointer to password element. (We currently only support single
     // password forms).
     WebKit::WebInputElement password_element =
-        form_elements->input_elements[form_data.basic_data.fields[1].name];
+        form_elements->input_elements[GetPasswordField(form_data).name];
 
     // We might have already filled this form if there are two <form> elements
     // with identical markup.
@@ -487,8 +511,11 @@
     const webkit::forms::PasswordFormFillData& fill_data,
     const string16& input,
     std::vector<string16>* suggestions) {
-  if (StartsWith(fill_data.basic_data.fields[0].value, input, false))
-    suggestions->push_back(fill_data.basic_data.fields[0].value);
+  // There are both a password and a username.
+  if (HasUsernameField(fill_data) &&
+      StartsWith(GetUsernameField(fill_data).value, input, false)) {
+    suggestions->push_back(GetUsernameField(fill_data).value);
+  }
 
   webkit::forms::PasswordFormFillData::LoginCollection::const_iterator iter;
   for (iter = fill_data.additional_logins.begin();
@@ -553,11 +580,17 @@
   string16 username;
   string16 password;
 
+  // If there isn't any username form, just exit.
+  // Because this function is used for the case
+  // that the username form and the possword form exist.
+  if (!HasUsernameField(fill_data))
+    return false;
+
   // Look for any suitable matches to current field text.
-  if (DoUsernamesMatch(fill_data.basic_data.fields[0].value, current_username,
+  if (DoUsernamesMatch(GetUsernameField(fill_data).value, current_username,
                        exact_username_match)) {
-    username = fill_data.basic_data.fields[0].value;
-    password = fill_data.basic_data.fields[1].value;
+    username = GetUsernameField(fill_data).value;
+    password = GetPasswordField(fill_data).value;
   } else {
     // Scan additional logins for a match.
     webkit::forms::PasswordFormFillData::LoginCollection::const_iterator iter;