Bug 848078 - Remove shadowed variable in ContainerLayerD3D9. r=Bas

gfx/layers/d3d9/ContainerLayerD3D9.cpp

@@ -198,7 +198,6 @@ ContainerRender(Container* aContainer,
         return;
       }
 
-      nsRefPtr<IDirect3DSurface9> renderSurface;
       renderTexture->GetSurfaceLevel(0, getter_AddRefs(renderSurface));
       aManager->device()->SetRenderTarget(0, renderSurface);
     }