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

chrome/browser/gtk/import_dialog_gtk.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/gtk/import_dialog_gtk.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "chrome/common/gtk_util.h"
 #include "grit/generated_resources.h"
@@ skipping 24 matching lines @@
       GTK_STOCK_CANCEL,
       GTK_RESPONSE_REJECT,
       NULL);
   importer_host_->set_parent_window(GTK_WINDOW(dialog_));
 
   // Add import button separately as we might need to disable it, if
   // no supported browsers found.
   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.
   gtk_widget_set_size_request(dialog_, 300, -1);
 
   GtkWidget* content_area = GTK_DIALOG(dialog_)->vbox;
   gtk_box_set_spacing(GTK_BOX(content_area), gtk_util::kContentAreaSpacing);
 
   GtkWidget* combo_hbox = gtk_hbox_new(FALSE, gtk_util::kLabelSpacing);
   GtkWidget* from = gtk_label_new(
@@ skipping 36 matching lines @@
 
   // Detect any supported browsers that we can import from and fill
   // up the combo box. If none found, disable all controls except cancel.
   int profiles_count = importer_host_->GetAvailableProfileCount();
   if (profiles_count > 0) {
     for (int i = 0; i < profiles_count; i++) {
       std::wstring profile = importer_host_->GetSourceProfileNameAt(i);
       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());
     gtk_widget_set_sensitive(bookmarks_, FALSE);
     gtk_widget_set_sensitive(search_engines_, FALSE);
     gtk_widget_set_sensitive(passwords_, FALSE);
     gtk_widget_set_sensitive(history_, FALSE);
     gtk_widget_set_sensitive(import_button, FALSE);
   }
   gtk_combo_box_set_active(GTK_COMBO_BOX(combo_), 0);
@@ skipping 23 matching lines @@
       const ProfileInfo& source_profile =
           importer_host_->GetSourceProfileInfoAt(
           gtk_combo_box_get_active(GTK_COMBO_BOX(combo_)));
       StartImportingWithUI(parent_, items, importer_host_.get(),
                            source_profile, profile_, this, false);
     }
   } else {
     ImportCanceled();
   }
 }