Replaced PassRefPtr copies with moves.

third_party/WebKit/Source/bindings/core/v8/DOMWrapperWorld.cpp

Index: third_party/WebKit/Source/bindings/core/v8/DOMWrapperWorld.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/DOMWrapperWorld.cpp b/third_party/WebKit/Source/bindings/core/v8/DOMWrapperWorld.cpp
index e9fec1d0042dd10dca0f442984ad1f1a05fb5561..2ca94abe77662528dcd58c8f857e0602cbbe5da3 100644
--- a/third_party/WebKit/Source/bindings/core/v8/DOMWrapperWorld.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/DOMWrapperWorld.cpp
@@ -251,7 +251,7 @@ void DOMWrapperWorld::setIsolatedWorldSecurityOrigin(int worldId, PassRefPtr<Sec
 {
     ASSERT(isIsolatedWorldId(worldId));
     if (securityOrigin)
-        isolatedWorldSecurityOrigins().set(worldId, securityOrigin);
+        isolatedWorldSecurityOrigins().set(worldId, std::move(securityOrigin));
     else
         isolatedWorldSecurityOrigins().remove(worldId);
 }