diff --git a/atom/browser/api/atom_api_auto_updater.cc b/atom/browser/api/atom_api_auto_updater.cc
index c23e488f64fd..427588a2aeab 100644
--- a/atom/browser/api/atom_api_auto_updater.cc
+++ b/atom/browser/api/atom_api_auto_updater.cc
@@ -57,6 +57,24 @@ void AutoUpdater::OnError(const std::string& message) {
       message);
 }
 
+void AutoUpdater::OnError(const std::string& message, const int code, const std::string& domain) {
+  v8::Locker locker(isolate());
+  v8::HandleScope handle_scope(isolate());
+  auto error = v8::Exception::Error(mate::StringToV8(isolate(), message));
+  auto errorObject = error->ToObject(isolate()->GetCurrentContext()).ToLocalChecked();
+
+  // add two new params for better error handling
+  errorObject->Set(mate::StringToV8(isolate(), "code"), v8::Integer::New(isolate(), code));
+  errorObject->Set(mate::StringToV8(isolate(), "domain"), mate::StringToV8(isolate(), domain));
+
+  mate::EmitEvent(
+      isolate(),
+      GetWrapper(),
+      "error",
+      errorObject,
+      message);
+}
+
 void AutoUpdater::OnCheckingForUpdate() {
   Emit("checking-for-update");
 }
diff --git a/atom/browser/api/atom_api_auto_updater.h b/atom/browser/api/atom_api_auto_updater.h
index 83a66146a3fb..1b522e334c6e 100644
--- a/atom/browser/api/atom_api_auto_updater.h
+++ b/atom/browser/api/atom_api_auto_updater.h
@@ -32,6 +32,7 @@ class AutoUpdater : public mate::EventEmitter<AutoUpdater>,
 
   // Delegate implementations.
   void OnError(const std::string& error) override;
+  void OnError(const std::string& message, const int code, const std::string& domain);
   void OnCheckingForUpdate() override;
   void OnUpdateAvailable() override;
   void OnUpdateNotAvailable() override;
diff --git a/atom/browser/auto_updater_mac.mm b/atom/browser/auto_updater_mac.mm
index b9d769c472ed..7527a6623bf2 100644
--- a/atom/browser/auto_updater_mac.mm
+++ b/atom/browser/auto_updater_mac.mm
@@ -104,8 +104,7 @@ void AutoUpdater::CheckForUpdates() {
           delegate->OnUpdateNotAvailable();
         }
       } error:^(NSError *error) {
-        NSMutableString *failureString =
-          [[NSString stringWithFormat:@"%@:%@:%@", error.code, error.domain, error.localizedDescription] mutableCopy];
+        NSMutableString *failureString = [NSMutableString stringWithString:error.localizedDescription];
         if (error.localizedFailureReason) {
           [failureString appendString:@": "];
           [failureString appendString:error.localizedFailureReason];
diff --git a/atom/browser/ui/file_dialog_kde.cc b/atom/browser/ui/file_dialog_kde.cc
deleted file mode 100644
index d77f77c84ad3..000000000000
--- a/atom/browser/ui/file_dialog_kde.cc
+++ /dev/null
@@ -1,63 +0,0 @@
-#include "atom/browser/ui/file_dialog.h"
-
-#include "atom/browser/native_window_views.h"
-#include "atom/browser/unresponsive_suppressor.h"
-#include "base/callback.h"
-#include "base/files/file_util.h"
-#include "base/strings/string_util.h"
-#include "chrome/browser/ui/libgtkui/gtk_signal.h"
-#include "chrome/browser/ui/libgtkui/gtk_util.h"
-#include "ui/views/widget/desktop_aura/x11_desktop_handler.h"
-
-namespace file_dialog {
-
-namespace {
-
-// invoke kdialog command line util 
-const char kKdialogBinary[] = "kdialog";
-
-} // end of anonymous namespace
-
-bool ShowOpenDialog(const DialogSettings& settings, std::vector<base::FilePath>* paths) {
-        GtkFileChooserAction action = GTK_FILE_CHOOSER_ACTION_OPEN;
-        if (settings.properties & FILE_DIALOG_OPEN_DIRECTORY)
-                action = GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER;
-        FileChooserDialog open_dialog(action, settings);
-        open_dialog.SetupProperties(settings.properties);
-
-        gtk_widget_show_all(open_dialog.dialog());
-        int response = gtk_dialog_run(GTK_DIALOG(open_dialog.dialog()));
-        if (response == GTK_RESPONSE_ACCEPT) {
-                *paths = open_dialog.GetFileNames();
-                return true;
-        } else {
-                return false;
-        }
-}
-
-void ShowOpenDialog(const DialogSettings& settings, const OpenDialogCallback& callback) {
-        GtkFileChooserAction action = GTK_FILE_CHOOSER_ACTION_OPEN;
-        if (settings.properties & FILE_DIALOG_OPEN_DIRECTORY)
-                action = GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER;
-        FileChooserDialog* open_dialog = new FileChooserDialog(action, settings);
-        open_dialog->SetupProperties(settings.properties);
-        open_dialog->RunOpenAsynchronous(callback);
-}
-
-bool ShowSaveDialog(const DialogSettings& settings, base::FilePath* path) {
-        FileChooserDialog save_dialog(GTK_FILE_CHOOSER_ACTION_SAVE, settings);
-        gtk_widget_show_all(save_dialog.dialog());
-        int response = gtk_dialog_run(GTK_DIALOG(save_dialog.dialog()));
-        if (response == GTK_RESPONSE_ACCEPT) {
-                *path = save_dialog.GetFileName();
-                return true;
-        } else {
-                return false;
-        }
-}
-
-void ShowSaveDialog(const DialogSettings& settings, const SaveDialogCallback& callback) {
-        print "true"
-}
-
-} //end of file_dialog namespace