WIP: Propagate SurfaceID up window tree hierarchy

cc/ipc/cc_param_traits.h

Index: cc/ipc/cc_param_traits.h
diff --git a/cc/ipc/cc_param_traits.h b/cc/ipc/cc_param_traits.h
index 52ed04ae610f0012a66ee5d8301a076e103b05a4..67ab1453a18f31f252f867039e858321aa4f1b51 100644
--- a/cc/ipc/cc_param_traits.h
+++ b/cc/ipc/cc_param_traits.h
@@ -71,6 +71,17 @@ struct CC_IPC_EXPORT ParamTraits<cc::RenderPass> {
 };
 
 template <>
+struct CC_IPC_EXPORT ParamTraits<cc::FrameSinkId> {
+  typedef cc::FrameSinkId param_type;
+  static void GetSize(base::PickleSizer* s, const param_type& p);
+  static void Write(base::Pickle* m, const param_type& p);
+  static bool Read(const base::Pickle* m,
+                   base::PickleIterator* iter,
+                   param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
 struct CC_IPC_EXPORT ParamTraits<cc::SurfaceId> {
   typedef cc::SurfaceId param_type;
   static void GetSize(base::PickleSizer* s, const param_type& p);