Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/core/html/HTMLSelectElementTest.cpp

 // Copyright 2014 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 "core/html/HTMLSelectElement.h"
 
 #include "core/frame/FrameView.h"
 #include "core/html/HTMLDocument.h"
 #include "core/html/HTMLFormElement.h"
 #include "core/html/forms/FormController.h"
 #include "core/loader/EmptyClients.h"
 #include "core/testing/DummyPageHolder.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include <memory>
 
 namespace blink {
 
 class HTMLSelectElementTest : public::testing::Test {
 protected:
     void SetUp() override;
     HTMLDocument& document() const { return *m_document; }
 
 private:
-    std::unique_ptr<DummyPageHolder> m_dummyPageHolder;
+    OwnPtr<DummyPageHolder> m_dummyPageHolder;
     Persistent<HTMLDocument> m_document;
 };
 
 void HTMLSelectElementTest::SetUp()
 {
     Page::PageClients pageClients;
     fillWithEmptyClients(pageClients);
     m_dummyPageHolder = DummyPageHolder::create(IntSize(800, 600), &pageClients);
 
     m_document = toHTMLDocument(&m_dummyPageHolder->document());
@@ skipping 300 matching lines @@
     EXPECT_EQ(select->defaultToolTip(), option->defaultToolTip());
     EXPECT_EQ(select->defaultToolTip(), optgroup->defaultToolTip());
 
     option->remove();
     optgroup->remove();
     EXPECT_EQ(String(), option->defaultToolTip());
     EXPECT_EQ(String(), optgroup->defaultToolTip());
 }
 
 } // namespace blink