Revert "Remove OwnPtr from Blink."

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

 // Copyright 2015 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/DocumentStatisticsCollector.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/FrameView.h"
 #include "core/html/HTMLHeadElement.h"
 #include "core/html/HTMLLinkElement.h"
 #include "core/testing/DummyPageHolder.h"
 #include "public/platform/WebDistillability.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "wtf/text/StringBuilder.h"
-#include <memory>
 
 namespace blink {
 
 // Saturate the length of a paragraph to save time.
 const unsigned kTextContentLengthSaturation = 1000;
 
 // Filter out short P elements. The threshold is set to around 2 English sentences.
 const unsigned kParagraphLengthThreshold = 140;
 
 class DocumentStatisticsCollectorTest : public ::testing::Test {
 protected:
     void SetUp() override;
 
     void TearDown() override
     {
         ThreadHeap::collectAllGarbage();
     }
 
     Document& document() const { return m_dummyPageHolder->document(); }
 
     void setHtmlInnerHTML(const String&);
 
 private:
-    std::unique_ptr<DummyPageHolder> m_dummyPageHolder;
+    OwnPtr<DummyPageHolder> m_dummyPageHolder;
 };
 
 void DocumentStatisticsCollectorTest::SetUp()
 {
     m_dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
 }
 
 void DocumentStatisticsCollectorTest::setHtmlInnerHTML(const String& htmlContent)
 {
     document().documentElement()->setInnerHTML((htmlContent), ASSERT_NO_EXCEPTION);
@@ skipping 93 matching lines @@
     );
     WebDistillabilityFeatures features = DocumentStatisticsCollector::collectStatistics(document());
 
     double error = 1e-5;
     EXPECT_NEAR(features.mozScore, 6 * sqrt(kTextContentLengthSaturation - kParagraphLengthThreshold), error);
     EXPECT_NEAR(features.mozScoreAllSqrt, 6 * sqrt(kTextContentLengthSaturation), error);
     EXPECT_NEAR(features.mozScoreAllLinear, 6 * kTextContentLengthSaturation, error);
 }
 
 } // namespace blink