[DISCARD] While getting plug-in info, use securityOrigin() of the top level frame

chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc

Index: chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc
diff --git a/chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc b/chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc
index 8441f7690c6a63036feefd389eccd1bddd61136a..ae437787999705c8610a1aa1f0c169f5717ebf2d 100644
--- a/chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc
+++ b/chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc
@@ -42,6 +42,8 @@ scoped_ptr<blink::WebPluginPlaceholder> CreateShadowDOMPlaceholderForPluginInfo(
   if (!ShadowDOMPluginPlaceholderEnabled())
     return nullptr;
 
+  blink::WebSecurityOrigin top_level_origin = frame->top()->securityOrigin();
+  DCHECK(!top_level_origin.isNull());
   std::string orig_mime_type = orig_params.mimeType.utf8();
   // TODO(jbroman): Investigate whether browser plugin needs special handling.
   ChromeViewHostMsg_GetPluginInfo_Output output;
@@ -49,7 +51,7 @@ scoped_ptr<blink::WebPluginPlaceholder> CreateShadowDOMPlaceholderForPluginInfo(
   render_frame->Send(
       new ChromeViewHostMsg_GetPluginInfo(render_frame->GetRoutingID(),
                                           GURL(orig_params.url),
-                                          frame->top()->document().url(),
+                                          GURL(top_level_origin.toString()),
                                           orig_mime_type,
                                           &output));
 #else