Remove OwnPtr from Blink.

third_party/WebKit/Source/core/dom/IncrementLoadEventDelayCount.h

Index: third_party/WebKit/Source/core/dom/IncrementLoadEventDelayCount.h
diff --git a/third_party/WebKit/Source/core/dom/IncrementLoadEventDelayCount.h b/third_party/WebKit/Source/core/dom/IncrementLoadEventDelayCount.h
index 43e971dbbf6f22d6d5aa65d3f8834e5e555cb7c6..dfafde11f6a4b2f7694331e904661fa9e3c21e90 100644
--- a/third_party/WebKit/Source/core/dom/IncrementLoadEventDelayCount.h
+++ b/third_party/WebKit/Source/core/dom/IncrementLoadEventDelayCount.h
@@ -8,6 +8,7 @@
 #include "platform/heap/Handle.h"
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
+#include <memory>
 
 namespace blink {
 
@@ -20,7 +21,7 @@ class IncrementLoadEventDelayCount {
     WTF_MAKE_NONCOPYABLE(IncrementLoadEventDelayCount);
 
 public:
-    static PassOwnPtr<IncrementLoadEventDelayCount> create(Document&);
+    static std::unique_ptr<IncrementLoadEventDelayCount> create(Document&);
     ~IncrementLoadEventDelayCount();
 
     // Increments the new document's count and decrements the old count.