Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.h

Index: third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.h
diff --git a/third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.h b/third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.h
index d07fd3719b123446fe33061d006f1100898adbe5..cdc362b6318bec4cb458955f5768bd5ae8eb43f7 100644
--- a/third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.h
+++ b/third_party/WebKit/Source/platform/mac/ScrollAnimatorMac.h
@@ -35,7 +35,6 @@
 #include "platform/scroll/ScrollAnimatorBase.h"
 #include "public/platform/WebTaskRunner.h"
 #include "wtf/RetainPtr.h"
-#include <memory>
 
 OBJC_CLASS BlinkScrollAnimationHelperDelegate;
 OBJC_CLASS BlinkScrollbarPainterControllerDelegate;
@@ -83,11 +82,11 @@ private:
     RetainPtr<BlinkScrollbarPainterDelegate> m_verticalScrollbarPainterDelegate;
 
     void initialScrollbarPaintTask();
-    std::unique_ptr<CancellableTaskFactory> m_initialScrollbarPaintTaskFactory;
+    OwnPtr<CancellableTaskFactory> m_initialScrollbarPaintTaskFactory;
 
     void sendContentAreaScrolledTask();
-    std::unique_ptr<CancellableTaskFactory> m_sendContentAreaScrolledTaskFactory;
-    std::unique_ptr<WebTaskRunner> m_taskRunner;
+    OwnPtr<CancellableTaskFactory> m_sendContentAreaScrolledTaskFactory;
+    OwnPtr<WebTaskRunner> m_taskRunner;
     FloatSize m_contentAreaScrolledTimerScrollDelta;
 
     ScrollResult userScroll(ScrollGranularity, const FloatSize& delta) override;