Remove OwnPtr from Blink.

third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp

Index: third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp
diff --git a/third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp b/third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp
index b10144a195422c117d117f691c8dd3a1c6ae0776..ddd9976cf30e1597d4a3d2e2f4a02865adfce20d 100644
--- a/third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp
+++ b/third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp
@@ -9,6 +9,7 @@
 #include "core/html/canvas/CanvasRenderingContext.h"
 #include "core/html/canvas/CanvasRenderingContextFactory.h"
 #include "wtf/MathExtras.h"
+#include <memory>
 
 namespace blink {
 
@@ -95,7 +96,7 @@ CanvasRenderingContextFactory* OffscreenCanvas::getRenderingContextFactory(int t
     return renderingContextFactories()[type].get();
 }
 
-void OffscreenCanvas::registerRenderingContextFactory(PassOwnPtr<CanvasRenderingContextFactory> renderingContextFactory)
+void OffscreenCanvas::registerRenderingContextFactory(std::unique_ptr<CanvasRenderingContextFactory> renderingContextFactory)
 {
     CanvasRenderingContext::ContextType type = renderingContextFactory->getContextType();
     ASSERT(type < CanvasRenderingContext::ContextTypeCount);