Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/web/WebNodeTest.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 "public/web/WebNode.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/testing/DummyPageHolder.h"
 #include "public/web/WebElement.h"
 #include "public/web/WebElementCollection.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include <memory>
 
 namespace blink {
 
 class WebNodeTest : public testing::Test {
 protected:
     Document& document()
     {
         return m_pageHolder->document();
     }
 
     void setInnerHTML(const String& html)
     {
         document().documentElement()->setInnerHTML(html, ASSERT_NO_EXCEPTION);
     }
 
     WebNode root()
     {
         return WebNode(document().documentElement());
     }
 
 private:
     void SetUp() override;
 
-    std::unique_ptr<DummyPageHolder> m_pageHolder;
+    OwnPtr<DummyPageHolder> m_pageHolder;
 };
 
 void WebNodeTest::SetUp()
 {
     m_pageHolder = DummyPageHolder::create(IntSize(800, 600));
 }
 
 TEST_F(WebNodeTest, QuerySelectorMatches)
 {
     setInnerHTML("<div id=x><span class=a></span></div>");
@@ skipping 22 matching lines @@
     // WebNode::getElementsByHTMLTagName returns only HTML elements.
     WebElementCollection collection = root().getElementsByHTMLTagName("label");
     EXPECT_EQ(1u, collection.length());
     EXPECT_TRUE(collection.firstItem().hasHTMLTagName("label"));
     // The argument should be lower-case.
     collection = root().getElementsByHTMLTagName("LABEL");
     EXPECT_EQ(0u, collection.length());
 }
 
 } // namespace blink