Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/bindings/core/v8/V8BindingForTesting.h

Index: third_party/WebKit/Source/bindings/core/v8/V8BindingForTesting.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8BindingForTesting.h b/third_party/WebKit/Source/bindings/core/v8/V8BindingForTesting.h
index 564634a3c630e04e1872897d60ebbc14a5dbafe0..bc2810b340350afc6f10c71fd866be946bbc812d 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8BindingForTesting.h
+++ b/third_party/WebKit/Source/bindings/core/v8/V8BindingForTesting.h
@@ -9,6 +9,8 @@
 #include "bindings/core/v8/ScriptState.h"
 #include "wtf/Allocator.h"
 #include "wtf/Forward.h"
+#include "wtf/OwnPtr.h"
+
 #include <v8.h>
 
 namespace blink {
@@ -45,7 +47,7 @@ public:
     ~V8TestingScope();
 
 private:
-    std::unique_ptr<DummyPageHolder> m_holder;
+    OwnPtr<DummyPageHolder> m_holder;
     v8::HandleScope m_handleScope;
     v8::Local<v8::Context> m_context;
     v8::Context::Scope m_contextScope;