Add the page url to plugin crashes to aid debugging.

chrome/plugin/webplugin_delegate_stub.h

 // 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.
 
 #ifndef CHROME_PLUGIN_WEBPLUGIN_DELEGATE_STUB_H_
 #define CHROME_PLUGIN_WEBPLUGIN_DELEGATE_STUB_H_
 
 #include <queue>
 
 #include "base/gfx/rect.h"
 #include "base/ref_counted.h"
 #include "base/shared_memory.h"
 #include "base/task.h"
 #include "chrome/common/ipc_channel.h"
 #include "chrome/common/transport_dib.h"
+#include "googleurl/src/gurl.h"
 #include "third_party/npapi/bindings/npapi.h"
 
-class GURL;
 class PluginChannel;
 class WebPluginProxy;
 class WebPluginDelegate;
 struct PluginMsg_Init_Params;
 struct PluginMsg_DidReceiveResponseParams;
 struct PluginMsg_URLRequestReply_Params;
 class WebCursor;
 
 namespace WebKit {
 class WebInputEvent;
@@ skipping 69 matching lines @@
                           base::SharedMemoryHandle* remote_handle);
 
   std::string mime_type_;
   int instance_id_;
 
   scoped_refptr<PluginChannel> channel_;
 
   WebPluginDelegate* delegate_;
   WebPluginProxy* webplugin_;
 
+  // The url of the main frame hosting the plugin.
+  GURL page_url_;
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(WebPluginDelegateStub);
 };
 
 #endif  // CHROME_PLUGIN_WEBPLUGIN_DELEGATE_STUB_H_