Remove OwnPtr from Blink.

third_party/WebKit/Source/platform/heap/Visitor.cpp

Index: third_party/WebKit/Source/platform/heap/Visitor.cpp
diff --git a/third_party/WebKit/Source/platform/heap/Visitor.cpp b/third_party/WebKit/Source/platform/heap/Visitor.cpp
index 36498604a8a9fb8f7b3f631541261b7f5cf40e73..e69f336b40d6231f2655d72d6346536d86ebd3cc 100644
--- a/third_party/WebKit/Source/platform/heap/Visitor.cpp
+++ b/third_party/WebKit/Source/platform/heap/Visitor.cpp
@@ -7,21 +7,23 @@
 #include "platform/heap/BlinkGC.h"
 #include "platform/heap/MarkingVisitor.h"
 #include "platform/heap/ThreadState.h"
+#include "wtf/PtrUtil.h"
+#include <memory>
 
 namespace blink {
 
-PassOwnPtr<Visitor> Visitor::create(ThreadState* state, BlinkGC::GCType gcType)
+std::unique_ptr<Visitor> Visitor::create(ThreadState* state, BlinkGC::GCType gcType)
 {
     switch (gcType) {
     case BlinkGC::GCWithSweep:
     case BlinkGC::GCWithoutSweep:
-        return adoptPtr(new MarkingVisitor<Visitor::GlobalMarking>(state));
+        return wrapUnique(new MarkingVisitor<Visitor::GlobalMarking>(state));
     case BlinkGC::TakeSnapshot:
-        return adoptPtr(new MarkingVisitor<Visitor::SnapshotMarking>(state));
+        return wrapUnique(new MarkingVisitor<Visitor::SnapshotMarking>(state));
     case BlinkGC::ThreadTerminationGC:
-        return adoptPtr(new MarkingVisitor<Visitor::ThreadLocalMarking>(state));
+        return wrapUnique(new MarkingVisitor<Visitor::ThreadLocalMarking>(state));
     case BlinkGC::ThreadLocalWeakProcessing:
-        return adoptPtr(new MarkingVisitor<Visitor::WeakProcessing>(state));
+        return wrapUnique(new MarkingVisitor<Visitor::WeakProcessing>(state));
     default:
         ASSERT_NOT_REACHED();
     }