Set the default action of the import data dialog to "Import" and

chrome/browser/gtk/import_dialog_gtk.cc

Index: chrome/browser/gtk/import_dialog_gtk.cc
diff --git a/chrome/browser/gtk/import_dialog_gtk.cc b/chrome/browser/gtk/import_dialog_gtk.cc
index c1cbf35a9ba09bd6a5a497192b9d2e2a24cbd780..52f4dc6ff8f7ad03451ef1efc26ee65de36daeba 100644
--- a/chrome/browser/gtk/import_dialog_gtk.cc
+++ b/chrome/browser/gtk/import_dialog_gtk.cc
@@ -42,6 +42,8 @@ ImportDialogGtk::ImportDialogGtk(GtkWindow* parent, Profile* profile) :
   GtkWidget* import_button = gtk_util::AddButtonToDialog(dialog_,
       l10n_util::GetStringUTF8(IDS_IMPORT_COMMIT).c_str(),
       GTK_STOCK_APPLY, GTK_RESPONSE_ACCEPT);
+  GTK_WIDGET_SET_FLAGS(import_button, GTK_CAN_DEFAULT);
+  gtk_dialog_set_default_response(GTK_DIALOG(dialog_), GTK_RESPONSE_ACCEPT);
 
   // TODO(rahulk): find how to set size properly so that the dialog
   // box width is at least enough to display full title.
@@ -98,6 +100,7 @@ ImportDialogGtk::ImportDialogGtk(GtkWindow* parent, Profile* profile) :
       gtk_combo_box_append_text(GTK_COMBO_BOX(combo_),
                                 WideToUTF8(profile).c_str());
     }
+    gtk_widget_grab_focus(import_button);
   } else {
     gtk_combo_box_append_text(GTK_COMBO_BOX(combo_),
         l10n_util::GetStringUTF8(IDS_IMPORT_NO_PROFILE_FOUND).c_str());