Add skeleton plumbing for serial API. No functionality yet.

chrome/browser/extensions/extension_function_dispatcher.cc

Index: chrome/browser/extensions/extension_function_dispatcher.cc
diff --git a/chrome/browser/extensions/extension_function_dispatcher.cc b/chrome/browser/extensions/extension_function_dispatcher.cc
index c58345669eca74cb38f94791c47386e75aa33704..107911b9028317edeb2d0595752c3e0665ecf988 100644
--- a/chrome/browser/extensions/extension_function_dispatcher.cc
+++ b/chrome/browser/extensions/extension_function_dispatcher.cc
@@ -17,6 +17,7 @@
 #include "chrome/browser/bookmarks/bookmark_manager_extension_api.h"
 #include "chrome/browser/download/download_extension_api.h"
 #include "chrome/browser/extensions/api/dns/dns_api.h"
+#include "chrome/browser/extensions/api/serial/serial_api.h"
 #include "chrome/browser/extensions/api/socket/socket_api.h"
 #include "chrome/browser/extensions/execute_code_in_tab_function.h"
 #include "chrome/browser/extensions/extension_activity_log.h"
@@ -481,6 +482,10 @@ void FactoryRegistry::ResetFunctions() {
   // TopSites
   RegisterFunction<GetTopSitesFunction>();
 
+  // Serial
+  RegisterFunction<extensions::SerialOpenFunction>();
+  RegisterFunction<extensions::SerialCloseFunction>();
+
   // Sockets
   RegisterFunction<extensions::SocketCreateFunction>();
   RegisterFunction<extensions::SocketDestroyFunction>();