Fix a selection clipboard leak.

webkit/tools/test_shell/test_webview_delegate_gtk.cc

 // Copyright (c) 2008 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.
 
 // This file was forked off the Mac port.
 
 #include "webkit/tools/test_shell/test_webview_delegate.h"
 
 #include <gtk/gtk.h>
 
@@ skipping 240 matching lines @@
   GtkTargetList* target_list = gtk_target_list_new(NULL, 0);
   gtk_target_list_add(target_list, GetTextHtmlAtom(), 0, TEXT_HTML);
   gtk_target_list_add_text_targets(target_list, PLAIN_TEXT);
 
   gint num_targets = 0;
   GtkTargetEntry* targets = gtk_target_table_new_from_list(target_list,
                                                            &num_targets);
   gtk_clipboard_set_with_data(clipboard, targets, num_targets,
                               SelectionClipboardGetContents, NULL,
                               shell_->webView());
+  gtk_target_list_unref(target_list);
   gtk_target_table_free(targets, num_targets);
 }
 
 // Private methods -----------------------------------------------------------
 
 void TestWebViewDelegate::SetPageTitle(const std::wstring& title) {
   gtk_window_set_title(GTK_WINDOW(shell_->mainWnd()),
                        ("Test Shell - " + WideToUTF8(title)).c_str());
 }
 
 void TestWebViewDelegate::SetAddressBarURL(const GURL& url) {
   gtk_entry_set_text(GTK_ENTRY(shell_->editWnd()), url.spec().c_str());
 }