linux: cleanup browser-side GtkSockets when plugins are destroyed

webkit/glue/webplugin_impl.cc

 // Copyright (c) 2006-2008 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.
 
 #include "config.h"
 
 #include "Cursor.h"
 #include "Document.h"
 #include "DocumentLoader.h"
 #include "Event.h"
@@ skipping 380 matching lines @@
 void WebPluginImpl::SetWindow(gfx::PluginWindowHandle window) {
   if (window) {
     DCHECK(!windowless_);  // Make sure not called twice.
     window_ = window;
   } else {
     DCHECK(!window_);  // Make sure not called twice.
     windowless_ = true;
   }
 }
 
+void WebPluginImpl::WillDestroyWindow(gfx::PluginWindowHandle window) {
+  WebCore::Frame* frame = element_->document()->frame();
+  WebFrameImpl* webframe = WebFrameImpl::FromFrame(frame);
+  WebViewImpl* webview = webframe->GetWebViewImpl();
+  if (!webview->delegate())
+    return;
+  webview->delegate()->WillDestroyPluginWindow(window);
+}
+
 bool WebPluginImpl::CompleteURL(const std::string& url_in,
                                 std::string* url_out) {
   if (!frame() || !frame()->document()) {
     NOTREACHED();
     return false;
   }
 
   WebCore::String str(webkit_glue::StdStringToString(url_in));
   WebCore::String url = frame()->document()->completeURL(str);
   std::wstring wurl = webkit_glue::StringToStdWString(url);
@@ skipping 999 matching lines @@
 
   WebPluginGeometry move;
   move.window = window_;
   move.window_rect = gfx::Rect();
   move.clip_rect = gfx::Rect();
   move.rects_valid = false;
   move.visible = widget_->isVisible();
 
   webview->delegate()->DidMove(webview, move);
 }