Boilerplate code to add chrome://syncfs-internals page for debugging.

chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc

Index: chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
diff --git a/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc b/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
index 0b054c67f57516aa28ea953c849d475a67c6ddb4..415ff3d37f885b8b9131f66dc70fea993d373fcf 100644
--- a/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
+++ b/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
@@ -45,6 +45,7 @@
 #include "chrome/browser/ui/webui/quota_internals_ui.h"
 #include "chrome/browser/ui/webui/signin/profile_signin_confirmation_ui.h"
 #include "chrome/browser/ui/webui/signin_internals_ui.h"
+#include "chrome/browser/ui/webui/sync_file_system_internals_ui.h"
 #include "chrome/browser/ui/webui/sync_internals_ui.h"
 #include "chrome/browser/ui/webui/user_actions/user_actions_ui.h"
 #include "chrome/browser/ui/webui/version_ui.h"
@@ -237,6 +238,8 @@ WebUIFactoryFunction GetWebUIFactoryFunction(WebUI* web_ui,
     return &NewWebUI<QuotaInternalsUI>;
   if (url.host() == chrome::kChromeUISignInInternalsHost)
     return &NewWebUI<SignInInternalsUI>;
+  if (url.host() == chrome::kChromeUISyncFileSystemInternalsHost)
+    return &NewWebUI<SyncFileSystemInternalsUI>;
   if (url.host() == chrome::kChromeUISyncInternalsHost)
     return &NewWebUI<SyncInternalsUI>;
   if (url.host() == chrome::kChromeUISyncResourcesHost)