gdata: Add requestDirectoryRefresh to file_browser_private.

chrome/browser/chromeos/extensions/file_browser_private_api.cc

Index: chrome/browser/chromeos/extensions/file_browser_private_api.cc
diff --git a/chrome/browser/chromeos/extensions/file_browser_private_api.cc b/chrome/browser/chromeos/extensions/file_browser_private_api.cc
index 825bc6908abb0e1b20fca5bd0c561e0fdcd7aa66..b97fa81f07de826fb78221a5d3f4513146879e9e 100644
--- a/chrome/browser/chromeos/extensions/file_browser_private_api.cc
+++ b/chrome/browser/chromeos/extensions/file_browser_private_api.cc
@@ -2128,3 +2128,19 @@ bool GetNetworkConnectionStateFunction::RunImpl() {
 
   return true;
 }
+
+bool RequestDirectoryRefreshFunction::RunImpl() {
+  std::string file_url_as_string;
+  if (!args_->GetString(0, &file_url_as_string))
+    return false;
+
+  gdata::GDataSystemService* system_service =
+      gdata::GDataSystemServiceFactory::GetForProfile(profile_);
+  if (!system_service || !system_service->file_system())
+    return false;
+
+  FilePath directory_path = GetVirtualPathFromURL(GURL(file_url_as_string));
+  system_service->file_system()->RequestDirectoryRefresh(directory_path);
+
+  return true;
+}