Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/core/dom/CSSSelectorWatchTest.cpp

 // Copyright 2016 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/dom/CSSSelectorWatch.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/StyleEngine.h"
 #include "core/frame/FrameView.h"
 #include "core/html/HTMLElement.h"
 #include "core/testing/DummyPageHolder.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include <memory>
 
 namespace blink {
 
 class CSSSelectorWatchTest : public ::testing::Test {
 protected:
     void SetUp() override;
 
     Document& document() { return m_dummyPageHolder->document(); }
     StyleEngine& styleEngine() { return document().styleEngine(); }
 
     static const HashSet<String> addedSelectors(const CSSSelectorWatch& watch) { return watch.m_addedSelectors; }
     static const HashSet<String> removedSelectors(const CSSSelectorWatch& watch) { return watch.m_removedSelectors; }
     static void clearAddedRemoved(CSSSelectorWatch&);
 
 private:
-    std::unique_ptr<DummyPageHolder> m_dummyPageHolder;
+    OwnPtr<DummyPageHolder> m_dummyPageHolder;
 };
 
 void CSSSelectorWatchTest::SetUp()
 {
     m_dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
 }
 
 void CSSSelectorWatchTest::clearAddedRemoved(CSSSelectorWatch& watch)
 {
     watch.m_addedSelectors.clear();
@@ skipping 45 matching lines @@
     EXPECT_EQ(2u, afterCount - beforeCount);
 
     EXPECT_EQ(1u, addedSelectors(watch).size());
     EXPECT_TRUE(addedSelectors(watch).contains(".c"));
 
     EXPECT_EQ(1u, removedSelectors(watch).size());
     EXPECT_TRUE(removedSelectors(watch).contains(".b"));
 }
 
 } // namespace blink