[PPAPI][MediaStream] Support configure for video input.

ppapi/proxy/ppapi_param_traits.h

Index: ppapi/proxy/ppapi_param_traits.h
diff --git a/ppapi/proxy/ppapi_param_traits.h b/ppapi/proxy/ppapi_param_traits.h
index 3bf5fb6b6964c96f86f93a18415fa8a3789d46d5..095d707e6da037777126014705632621873b0115 100644
--- a/ppapi/proxy/ppapi_param_traits.h
+++ b/ppapi/proxy/ppapi_param_traits.h
@@ -16,6 +16,7 @@
 #include "ppapi/proxy/ppapi_proxy_export.h"
 #include "ppapi/shared_impl/file_path.h"
 #include "ppapi/shared_impl/file_ref_create_info.h"
+#include "ppapi/shared_impl/media_stream_video_track_shared.h"
 #include "ppapi/shared_impl/ppapi_permissions.h"
 #include "ppapi/shared_impl/socket_option_data.h"
 
@@ -176,6 +177,15 @@ struct PPAPI_PROXY_EXPORT ParamTraits<ppapi::SocketOptionData> {
   static void Log(const param_type& p, std::string* l);
 };
 
+template<>
+struct PPAPI_PROXY_EXPORT ParamTraits<
+    ppapi::MediaStreamVideoTrackShared::Attributes> {
+  typedef ppapi::MediaStreamVideoTrackShared::Attributes param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, PickleIterator* iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
 }  // namespace IPC
 
 #endif  // PPAPI_PROXY_PPAPI_PARAM_TRAITS_H_