Remove OwnPtr from Blink.

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

Index: third_party/WebKit/Source/core/frame/VisualViewport.cpp
diff --git a/third_party/WebKit/Source/core/frame/VisualViewport.cpp b/third_party/WebKit/Source/core/frame/VisualViewport.cpp
index cd084315dbc2d67e73b76e8f9d61c6c8ca7a5581..85c73df4a0db2517f8a404a18985d24c889f91ff 100644
--- a/third_party/WebKit/Source/core/frame/VisualViewport.cpp
+++ b/third_party/WebKit/Source/core/frame/VisualViewport.cpp
@@ -55,6 +55,7 @@
 #include "public/platform/WebLayerTreeView.h"
 #include "public/platform/WebScrollbar.h"
 #include "public/platform/WebScrollbarLayer.h"
+#include <memory>
 
 using blink::WebLayer;
 using blink::WebLayerTreeView;
@@ -375,7 +376,7 @@ void VisualViewport::attachToLayerTree(GraphicsLayer* currentLayerTreeRoot)
         return;
     }
 
-    if (currentLayerTreeRoot->parent() && currentLayerTreeRoot->parent() == m_innerViewportScrollLayer)
+    if (currentLayerTreeRoot->parent() && currentLayerTreeRoot->parent() == m_innerViewportScrollLayer.get())
         return;
 
     if (!m_innerViewportScrollLayer) {
@@ -447,7 +448,7 @@ void VisualViewport::setupScrollbar(WebScrollbar::Orientation orientation)
     bool isHorizontal = orientation == WebScrollbar::Horizontal;
     GraphicsLayer* scrollbarGraphicsLayer = isHorizontal ?
         m_overlayScrollbarHorizontal.get() : m_overlayScrollbarVertical.get();
-    OwnPtr<WebScrollbarLayer>& webScrollbarLayer = isHorizontal ?
+    std::unique_ptr<WebScrollbarLayer>& webScrollbarLayer = isHorizontal ?
         m_webOverlayScrollbarHorizontal : m_webOverlayScrollbarVertical;
 
     ScrollbarThemeOverlay& theme = ScrollbarThemeOverlay::mobileTheme();
@@ -832,7 +833,7 @@ String VisualViewport::debugName(const GraphicsLayer* graphicsLayer) const
         name =  "Overlay Scrollbar Horizontal Layer";
     } else if (graphicsLayer == m_overlayScrollbarVertical.get()) {
         name =  "Overlay Scrollbar Vertical Layer";
-    } else if (graphicsLayer == m_rootTransformLayer) {
+    } else if (graphicsLayer == m_rootTransformLayer.get()) {
         name =  "Root Transform Layer";
     } else {
         ASSERT_NOT_REACHED();