Implement proxying for FileRef and FileChooser....

ppapi/proxy/ppapi_param_traits.h

Index: ppapi/proxy/ppapi_param_traits.h
===================================================================
--- ppapi/proxy/ppapi_param_traits.h	(revision 74966)
+++ ppapi/proxy/ppapi_param_traits.h	(working copy)
@@ -18,6 +18,7 @@
 namespace pp {
 namespace proxy {
 
+struct PPBFileRef_CreateInfo;
 struct PPBFlash_DrawGlyphs_Params;
 struct PPBFont_DrawTextAt_Params;
 struct PPBURLLoader_UpdateProgress_Params;
@@ -96,6 +97,14 @@
 };
 
 template<>
+struct ParamTraits<pp::proxy::PPBFileRef_CreateInfo> {
+  typedef pp::proxy::PPBFileRef_CreateInfo param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template<>
 struct ParamTraits<pp::proxy::PPBFont_DrawTextAt_Params> {
   typedef pp::proxy::PPBFont_DrawTextAt_Params param_type;
   static void Write(Message* m, const param_type& p);