linux: cleanup browser-side GtkSockets when plugins are destroyed

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 80 matching lines @@
   const std::string& mtype =
       (actual_mime_type && !actual_mime_type->empty()) ? *actual_mime_type
                                                        : mime_type;
 
   GdkNativeWindow plugin_parent =
       shell_->webViewHost()->CreatePluginContainer();
 
   return WebPluginDelegateImpl::Create(info.path, mtype, plugin_parent);
 }
 
+void TestWebViewDelegate::WillDestroyPluginWindow(unsigned long id) {
+  shell_->webViewHost()->OnPluginWindowDestroyed(id);
+}
+
 void TestWebViewDelegate::ShowJavaScriptAlert(const std::wstring& message) {
   GtkWidget* dialog = gtk_message_dialog_new(
       shell_->mainWnd(), GTK_DIALOG_MODAL, GTK_MESSAGE_INFO,
       GTK_BUTTONS_OK, "%s", WideToUTF8(message).c_str());
   gtk_window_set_title(GTK_WINDOW(dialog), "JavaScript Alert");
   gtk_dialog_run(GTK_DIALOG(dialog));  // Runs a nested message loop.
   gtk_widget_destroy(dialog);
 }
 
 void TestWebViewDelegate::Show(WebWidget* webwidget,
@@ skipping 193 matching lines @@
 // 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());
 }