gtk: Rename OnDialogResponse() to OnResponse() to standardize on a consistent naming scheme.

chrome/browser/autofill/autofill_dialog_gtk.cc

Index: chrome/browser/autofill/autofill_dialog_gtk.cc
diff --git a/chrome/browser/autofill/autofill_dialog_gtk.cc b/chrome/browser/autofill/autofill_dialog_gtk.cc
index 0195014c503b9b1173351fbeaddc8a85df641bdd..6bcf897f1a0050bfdce05b62e5b5534bee33c1d9 100644
--- a/chrome/browser/autofill/autofill_dialog_gtk.cc
+++ b/chrome/browser/autofill/autofill_dialog_gtk.cc
@@ -115,7 +115,7 @@ class AutoFillDialog : public PersonalDataManager::Observer,
   // data is available if the response is GTK_RESPONSE_APPLY or GTK_RESPONSE_OK.
   // We close the dialog if the response is GTK_RESPONSE_OK or
   // GTK_RESPONSE_CANCEL.
-  CHROMEG_CALLBACK_1(AutoFillDialog, void, OnResponse, GtkDialog*, gint);
+  CHROMEGTK_CALLBACK_1(AutoFillDialog, void, OnResponse, int);
 
   CHROMEGTK_CALLBACK_0(AutoFillDialog, void, OnAutoFillCheckToggled);
   CHROMEG_CALLBACK_2(AutoFillDialog, void, OnRowActivated, GtkTreeView*,
@@ -252,11 +252,11 @@ void AutoFillDialog::OnDestroy(GtkWidget* widget) {
   MessageLoop::current()->DeleteSoon(FROM_HERE, this);
 }
 
-void AutoFillDialog::OnResponse(GtkDialog* dialog, gint response_id) {
+void AutoFillDialog::OnResponse(GtkWidget* dialog, int response_id) {
   if (response_id == GTK_RESPONSE_OK ||
       response_id == GTK_RESPONSE_CANCEL ||
       response_id == GTK_RESPONSE_DELETE_EVENT) {
-    gtk_widget_destroy(GTK_WIDGET(dialog));
+    gtk_widget_destroy(dialog);
   }
 
   if (response_id == kAutoFillDialogAboutLink)