Remove OwnPtr from Blink.

third_party/WebKit/Source/platform/exported/WebPrerender.cpp

Index: third_party/WebKit/Source/platform/exported/WebPrerender.cpp
diff --git a/third_party/WebKit/Source/platform/exported/WebPrerender.cpp b/third_party/WebKit/Source/platform/exported/WebPrerender.cpp
index f7d33ee79a3415f5c6b9e4783ac541decd77544e..5f23fca190f4a30aacd01bcca1032d07a79e2e6a 100644
--- a/third_party/WebKit/Source/platform/exported/WebPrerender.cpp
+++ b/third_party/WebKit/Source/platform/exported/WebPrerender.cpp
@@ -32,6 +32,8 @@
 
 #include "platform/Prerender.h"
 #include "wtf/PassRefPtr.h"
+#include "wtf/PtrUtil.h"
+#include <memory>
 
 namespace blink {
 
@@ -47,11 +49,11 @@ public:
 
 private:
     explicit ExtraDataContainer(WebPrerender::ExtraData* extraData)
-        : m_extraData(adoptPtr(extraData))
+        : m_extraData(wrapUnique(extraData))
     {
     }
 
-    OwnPtr<WebPrerender::ExtraData> m_extraData;
+    std::unique_ptr<WebPrerender::ExtraData> m_extraData;
 };
 
 } // namespace