Remove OwnPtr from Blink.

third_party/WebKit/Source/core/frame/VisualViewport.h

Index: third_party/WebKit/Source/core/frame/VisualViewport.h
diff --git a/third_party/WebKit/Source/core/frame/VisualViewport.h b/third_party/WebKit/Source/core/frame/VisualViewport.h
index d15d2345bc75053aadaea36228c1a0fb9e6614e1..58b3d7b9df16ff40d285fec0e479cbaaf56371c1 100644
--- a/third_party/WebKit/Source/core/frame/VisualViewport.h
+++ b/third_party/WebKit/Source/core/frame/VisualViewport.h
@@ -40,8 +40,7 @@
 #include "platform/scroll/ScrollableArea.h"
 #include "public/platform/WebScrollbar.h"
 #include "public/platform/WebSize.h"
-#include "wtf/OwnPtr.h"
-#include "wtf/PassOwnPtr.h"
+#include <memory>
 
 namespace blink {
 class WebLayerTreeView;
@@ -248,15 +247,15 @@ private:
     }
 
     Member<FrameHost> m_frameHost;
-    OwnPtr<GraphicsLayer> m_rootTransformLayer;
-    OwnPtr<GraphicsLayer> m_innerViewportContainerLayer;
-    OwnPtr<GraphicsLayer> m_overscrollElasticityLayer;
-    OwnPtr<GraphicsLayer> m_pageScaleLayer;
-    OwnPtr<GraphicsLayer> m_innerViewportScrollLayer;
-    OwnPtr<GraphicsLayer> m_overlayScrollbarHorizontal;
-    OwnPtr<GraphicsLayer> m_overlayScrollbarVertical;
-    OwnPtr<WebScrollbarLayer> m_webOverlayScrollbarHorizontal;
-    OwnPtr<WebScrollbarLayer> m_webOverlayScrollbarVertical;
+    std::unique_ptr<GraphicsLayer> m_rootTransformLayer;
+    std::unique_ptr<GraphicsLayer> m_innerViewportContainerLayer;
+    std::unique_ptr<GraphicsLayer> m_overscrollElasticityLayer;
+    std::unique_ptr<GraphicsLayer> m_pageScaleLayer;
+    std::unique_ptr<GraphicsLayer> m_innerViewportScrollLayer;
+    std::unique_ptr<GraphicsLayer> m_overlayScrollbarHorizontal;
+    std::unique_ptr<GraphicsLayer> m_overlayScrollbarVertical;
+    std::unique_ptr<WebScrollbarLayer> m_webOverlayScrollbarHorizontal;
+    std::unique_ptr<WebScrollbarLayer> m_webOverlayScrollbarVertical;
 
     // Offset of the visual viewport from the main frame's origin, in CSS pixels.
     FloatPoint m_offset;