[Extensions] Isolate ExtensionFunction results_ and error_

chrome/browser/chromeos/extensions/file_system_provider/provider_function.cc

Index: chrome/browser/chromeos/extensions/file_system_provider/provider_function.cc
diff --git a/chrome/browser/chromeos/extensions/file_system_provider/provider_function.cc b/chrome/browser/chromeos/extensions/file_system_provider/provider_function.cc
index 31a5afdfc77c38dfb2698001ac7f352f8c7b3cca..00bb49b04656d1d9f67c7a387cba4cd7eed0b5d5 100644
--- a/chrome/browser/chromeos/extensions/file_system_provider/provider_function.cc
+++ b/chrome/browser/chromeos/extensions/file_system_provider/provider_function.cc
@@ -163,7 +163,7 @@ bool FileSystemProviderInternalFunction::Parse() {
 
   if (!args_->GetString(0, &file_system_id) ||
       !args_->GetInteger(1, &request_id_)) {
-    bad_message_ = true;
+    set_bad_message(true);
     return false;
   }