Add the page url to plugin crashes to aid debugging.

chrome/plugin/npobject_stub.h

Index: chrome/plugin/npobject_stub.h
===================================================================
--- chrome/plugin/npobject_stub.h	(revision 20098)
+++ chrome/plugin/npobject_stub.h	(working copy)
@@ -12,6 +12,7 @@
 
 #include "base/ref_counted.h"
 #include "chrome/common/ipc_channel.h"
+#include "googleurl/src/gurl.h"
 
 namespace base {
 class WaitableEvent;
@@ -32,7 +33,8 @@
   NPObjectStub(NPObject* npobject,
                PluginChannelBase* channel,
                int route_id,
-               base::WaitableEvent* modal_dialog_event);
+               base::WaitableEvent* modal_dialog_event,
+               const GURL& page_url);
   ~NPObjectStub();
 
   // IPC::Message::Sender implementation:
@@ -90,6 +92,9 @@
   WebPluginDelegateProxy* web_plugin_delegate_proxy_;
 
   base::WaitableEvent* modal_dialog_event_;
+
+  // The url of the main frame hosting the plugin.
+  GURL page_url_;
 };
 
 #endif  // CHROME_PLUGIN_NPOBJECT_STUB_H_