Remove OwnPtr from Blink.

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

Index: third_party/WebKit/Source/core/dom/CSSSelectorWatchTest.cpp
diff --git a/third_party/WebKit/Source/core/dom/CSSSelectorWatchTest.cpp b/third_party/WebKit/Source/core/dom/CSSSelectorWatchTest.cpp
index fe7fcd4b144a528b3e2cbc23662b7903bf97c7a4..d4e47193acc158d10029fab3f61654b299a70fea 100644
--- a/third_party/WebKit/Source/core/dom/CSSSelectorWatchTest.cpp
+++ b/third_party/WebKit/Source/core/dom/CSSSelectorWatchTest.cpp
@@ -10,6 +10,7 @@
 #include "core/html/HTMLElement.h"
 #include "core/testing/DummyPageHolder.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include <memory>
 
 namespace blink {
 
@@ -25,7 +26,7 @@ protected:
     static void clearAddedRemoved(CSSSelectorWatch&);
 
 private:
-    OwnPtr<DummyPageHolder> m_dummyPageHolder;
+    std::unique_ptr<DummyPageHolder> m_dummyPageHolder;
 };
 
 void CSSSelectorWatchTest::SetUp()