Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/platform/ContentSettingCallbacks.h

Index: third_party/WebKit/Source/platform/ContentSettingCallbacks.h
diff --git a/third_party/WebKit/Source/platform/ContentSettingCallbacks.h b/third_party/WebKit/Source/platform/ContentSettingCallbacks.h
index 08f52831755bf8fbb164675d5ae6ec97b414a11a..2a76970df5809fbe3fda63235237acaade806125 100644
--- a/third_party/WebKit/Source/platform/ContentSettingCallbacks.h
+++ b/third_party/WebKit/Source/platform/ContentSettingCallbacks.h
@@ -9,7 +9,8 @@
 #include "wtf/Allocator.h"
 #include "wtf/Functional.h"
 #include "wtf/Noncopyable.h"
-#include <memory>
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
@@ -17,7 +18,7 @@ class PLATFORM_EXPORT ContentSettingCallbacks {
     USING_FAST_MALLOC(ContentSettingCallbacks);
     WTF_MAKE_NONCOPYABLE(ContentSettingCallbacks);
 public:
-    static std::unique_ptr<ContentSettingCallbacks> create(std::unique_ptr<SameThreadClosure> allowed, std::unique_ptr<SameThreadClosure> denied);
+    static PassOwnPtr<ContentSettingCallbacks> create(std::unique_ptr<SameThreadClosure> allowed, std::unique_ptr<SameThreadClosure> denied);
     virtual ~ContentSettingCallbacks() { }
 
     void onAllowed() { (*m_allowed)(); }