Revert "Remove OwnPtr from Blink."

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

Index: third_party/WebKit/Source/core/dom/ContextFeatures.cpp
diff --git a/third_party/WebKit/Source/core/dom/ContextFeatures.cpp b/third_party/WebKit/Source/core/dom/ContextFeatures.cpp
index 05d936e500387beae2641e788ca8172fa5937841..ee2f3e42a0abcd22e3ec0cb1732ecfedb75dae7e 100644
--- a/third_party/WebKit/Source/core/dom/ContextFeatures.cpp
+++ b/third_party/WebKit/Source/core/dom/ContextFeatures.cpp
@@ -29,15 +29,13 @@
 #include "core/dom/Document.h"
 #include "core/page/Page.h"
 #include "platform/RuntimeEnabledFeatures.h"
-#include "wtf/PtrUtil.h"
 #include "wtf/StdLibExtras.h"
-#include <memory>
 
 namespace blink {
 
-std::unique_ptr<ContextFeaturesClient> ContextFeaturesClient::empty()
+PassOwnPtr<ContextFeaturesClient> ContextFeaturesClient::empty()
 {
-    return wrapUnique(new ContextFeaturesClient());
+    return adoptPtr(new ContextFeaturesClient());
 }
 
 const char* ContextFeatures::supplementName()
@@ -66,7 +64,7 @@ bool ContextFeatures::mutationEventsEnabled(Document* document)
     return document->contextFeatures().isEnabled(document, MutationEvents, true);
 }
 
-void provideContextFeaturesTo(Page& page, std::unique_ptr<ContextFeaturesClient> client)
+void provideContextFeaturesTo(Page& page, PassOwnPtr<ContextFeaturesClient> client)
 {
     Supplement<Page>::provideTo(page, ContextFeatures::supplementName(), ContextFeatures::create(std::move(client)));
 }