Update the native_viewport interface to allow specification of the surface configuration, currently…

sky/shell/gpu/rasterizer.cc

Index: sky/shell/gpu/rasterizer.cc
diff --git a/sky/shell/gpu/rasterizer.cc b/sky/shell/gpu/rasterizer.cc
index 52a5525c8d19d8b3e195fc47094ba3e57e4a7e38..cb56a054a45c903b721e0366c10dff1113763ba8 100644
--- a/sky/shell/gpu/rasterizer.cc
+++ b/sky/shell/gpu/rasterizer.cc
@@ -37,7 +37,8 @@ base::WeakPtr<Rasterizer> Rasterizer::GetWeakPtr() {
 }
 
 void Rasterizer::OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget) {
-  surface_ = gfx::GLSurface::CreateViewGLSurface(widget);
+  surface_ = gfx::GLSurface::CreateViewGLSurface(widget,
+                                                 gfx::SurfaceConfiguration());
   CHECK(surface_) << "GLSurface required.";
 }