Extensions: Pass current channel and feature session type to extension unpack utility process.

extensions/common/extension_messages.h

Index: extensions/common/extension_messages.h
diff --git a/extensions/common/extension_messages.h b/extensions/common/extension_messages.h
index 1f257aeefa69d33e05feac642dd4474fdf0683d2..3ee85ff734df09b3d24e5b77beb0341dec6f2947 100644
--- a/extensions/common/extension_messages.h
+++ b/extensions/common/extension_messages.h
@@ -12,7 +12,6 @@
 
 #include "base/memory/shared_memory.h"
 #include "base/values.h"
-#include "components/version_info/version_info.h"
 #include "content/public/common/common_param_traits.h"
 #include "content/public/common/socket_permission_request.h"
 #include "extensions/common/api/messaging/message.h"
@@ -21,7 +20,8 @@
 #include "extensions/common/event_filtering_info.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extensions_client.h"
-#include "extensions/common/features/feature_session_type.h"
+#include "extensions/common/feature_channel_param_traits.h"
+#include "extensions/common/feature_session_type_param_traits.h"
 #include "extensions/common/host_id.h"
 #include "extensions/common/permissions/media_galleries_permission_data.h"
 #include "extensions/common/permissions/permission_set.h"
@@ -48,9 +48,6 @@ IPC_ENUM_TRAITS_MAX_VALUE(extensions::UserScript::RunLocation,
                           extensions::UserScript::RUN_LOCATION_LAST - 1)
 
 IPC_ENUM_TRAITS_MAX_VALUE(HostID::HostType, HostID::HOST_TYPE_LAST)
-IPC_ENUM_TRAITS_MAX_VALUE(version_info::Channel, version_info::Channel::STABLE)
-IPC_ENUM_TRAITS_MAX_VALUE(extensions::FeatureSessionType,
-                          extensions::FeatureSessionType::LAST)
 
 // Parameters structure for ExtensionHostMsg_AddAPIActionToActivityLog and
 // ExtensionHostMsg_AddEventToActivityLog.