[Password Manager] Modified to support saving passwords on forms without username fields.

components/password_manager/core/browser/password_manager_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/password_manager/core/browser/password_manager.h"
 
 #include <string>
 #include <vector>
 
 #include "base/message_loop/message_loop.h"
@@ skipping 159 matching lines @@
     form.username_element = ASCIIToUTF16("EmailField");
     form.password_element = ASCIIToUTF16("PasswdField");
     form.username_value = ASCIIToUTF16("twitter");
     form.password_value = ASCIIToUTF16("password");
     form.password_autocomplete_set = true;
     form.submit_element = ASCIIToUTF16("signIn");
     form.signon_realm = "https://twitter.com";
     return form;
   }
 
+  PasswordForm MakeSimpleFormWithOnlyPasswordField() {
+    PasswordForm form(MakeSimpleForm());
+    form.username_element.clear();
+    form.username_value.clear();
+    return form;
+  }
+
   bool FormsAreEqual(const autofill::PasswordForm& lhs,
                      const autofill::PasswordForm& rhs) {
     if (lhs.origin != rhs.origin)
       return false;
     if (lhs.action != rhs.action)
       return false;
     if (lhs.username_element != rhs.username_element)
       return false;
     if (lhs.password_element != rhs.password_element)
       return false;
@@ skipping 630 matching lines @@
   scoped_ptr<PasswordFormManager> form_to_save;
   EXPECT_CALL(client_, PromptUserToSavePasswordPtr(_)).Times(0);
 
   // Now the password manager waits for the login to complete successfully.
   observed.clear();
   manager()->OnPasswordFormsParsed(observed);    // The post-navigation load.
   manager()->OnPasswordFormsRendered(observed,
                                      true);  // The post-navigation layout.
 }
 
+TEST_F(PasswordManagerTest, FormSubmitWithOnlyPassowrdField) {
+  // Test to verify that on submitting the HTML password form without having
+  // username input filed shows password save promt and saves the password to
+  // store.
+  std::vector<PasswordForm*> result;  // Empty password store.
+  EXPECT_CALL(driver_, FillPasswordForm(_)).Times(Exactly(0));
+  EXPECT_CALL(*store_.get(), GetLogins(_, _, _))
+      .WillOnce(DoAll(WithArg<2>(InvokeConsumer(result)), Return()));
+  std::vector<PasswordForm> observed;
+
+  // Loads passsword form without username input field.
+  PasswordForm form(MakeSimpleFormWithOnlyPasswordField());
+  observed.push_back(form);
+  manager()->OnPasswordFormsParsed(observed);          // The initial load.
+  manager()->OnPasswordFormsRendered(observed, true);  // The initial layout.
+
+  // And the form submit contract is to call ProvisionallySavePassword.
+  manager()->ProvisionallySavePassword(form);
+
+  scoped_ptr<PasswordFormManager> form_to_save;
+  EXPECT_CALL(client_, PromptUserToSavePasswordPtr(_))
+      .WillOnce(WithArg<0>(SaveToScopedPtr(&form_to_save)));
+
+  // Now the password manager waits for the navigation to complete.
+  observed.clear();
+  manager()->OnPasswordFormsParsed(observed);  // The post-navigation load.
+  manager()->OnPasswordFormsRendered(observed,
+                                     true);  // The post-navigation layout.
+
+  ASSERT_TRUE(form_to_save.get());
+  EXPECT_CALL(*store_.get(), AddLogin(FormMatches(form)));
+
+  // Simulate saving the form, as if the info bar was accepted.
+  form_to_save->Save();
+}
+
 }  // namespace password_manager