[fsp] Use auto generated methods for generating dictionaries.

chrome/browser/chromeos/file_system_provider/operations/unmount.cc

Index: chrome/browser/chromeos/file_system_provider/operations/unmount.cc
diff --git a/chrome/browser/chromeos/file_system_provider/operations/unmount.cc b/chrome/browser/chromeos/file_system_provider/operations/unmount.cc
index de1ee761d3211e83aa0ab6e71b22e210e152b138..c40f969c845d575dae30aa7d9962ab15c21967e9 100644
--- a/chrome/browser/chromeos/file_system_provider/operations/unmount.cc
+++ b/chrome/browser/chromeos/file_system_provider/operations/unmount.cc
@@ -21,11 +21,17 @@ Unmount::~Unmount() {
 }
 
 bool Unmount::Execute(int request_id) {
-  scoped_ptr<base::DictionaryValue> values(new base::DictionaryValue);
+  using extensions::api::file_system_provider::UnmountRequestedOptions;
+
+  UnmountRequestedOptions options;
+  options.file_system_id = file_system_info_.file_system_id();
+  options.request_id = request_id;
+
   return SendEvent(
       request_id,
       extensions::api::file_system_provider::OnUnmountRequested::kEventName,
-      values.Pass());
+      extensions::api::file_system_provider::OnUnmountRequested::Create(
+          options));
 }
 
 void Unmount::OnSuccess(int /* request_id */,