Make Graphics3D::SwapBuffers take a completion callback

ppapi/cpp/dev/surface_3d_dev.cc

Index: ppapi/cpp/dev/surface_3d_dev.cc
diff --git a/ppapi/cpp/dev/surface_3d_dev.cc b/ppapi/cpp/dev/surface_3d_dev.cc
index a2226836f83b8bb62783e81c650ed23c60c6987a..eab8149e1a4bbeb049cd895c5feed70202ea3467 100644
--- a/ppapi/cpp/dev/surface_3d_dev.cc
+++ b/ppapi/cpp/dev/surface_3d_dev.cc
@@ -38,13 +38,13 @@ Surface3D_Dev::Surface3D_Dev(const Instance& instance,
   }
 }
 
-int32_t Surface3D_Dev::SwapBuffers() const {
+int32_t Surface3D_Dev::SwapBuffers(const CompletionCallback& cc) const {
   if (!has_interface<PPB_Surface3D_Dev>())
     return PP_ERROR_NOINTERFACE;
 
   return get_interface<PPB_Surface3D_Dev>()->SwapBuffers(
       pp_resource(),
-      PP_BlockUntilComplete());
+      cc.pp_completion_callback());
 }
 
 }  // namespace pp