Add password form search using blink::WebNode reference comparison.

components/autofill/content/renderer/provisionally_saved_password_form.cc

Index: components/autofill/content/renderer/provisionally_saved_password_form.cc
diff --git a/components/autofill/content/renderer/provisionally_saved_password_form.cc b/components/autofill/content/renderer/provisionally_saved_password_form.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a9af1ed44bb237900181591c602949d9d43f3884
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+++ b/components/autofill/content/renderer/provisionally_saved_password_form.cc
@@ -0,0 +1,42 @@
+// Copyright 2017 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/autofill/content/renderer/provisionally_saved_password_form.h"
+
+#include <utility>
+
+#include "components/autofill/core/common/password_form.h"
+
+namespace autofill {
+
+ProvisionallySavedPasswordForm::ProvisionallySavedPasswordForm() = default;
+
+ProvisionallySavedPasswordForm::~ProvisionallySavedPasswordForm() = default;
+
+void ProvisionallySavedPasswordForm::Set(
+    std::unique_ptr<PasswordForm> password_form,
+    const blink::WebFormElement& form_element,
+    const blink::WebInputElement& input_element) {
+  password_form_ = std::move(password_form);
+  form_element_ = form_element;
+  input_element_ = input_element;
+}
+
+void ProvisionallySavedPasswordForm::Reset() {
+  password_form_.reset();
+  form_element_.reset();
+  input_element_.reset();
+}
+
+bool ProvisionallySavedPasswordForm::IsSet() const {
+  return static_cast<bool>(password_form_);
+}
+
+bool ProvisionallySavedPasswordForm::IsPasswordValid() const {
+  return IsSet() && !password_form_->username_value.empty() &&
+         !(password_form_->password_value.empty() &&
+           password_form_->new_password_value.empty());
+}
+
+}  // namespace autofill