Use top frame's origin when checking content settings for plugins.

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 9175a103401b32d38b627624e6829697e7e2ad83..4f8f10b2e26d4061c31820b098b4a3d994e71997 100644
--- a/chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc
+++ b/chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc
@@ -46,10 +46,11 @@ scoped_ptr<blink::WebPluginPlaceholder> CreateShadowDOMPlaceholderForPluginInfo(
   // TODO(jbroman): Investigate whether browser plugin needs special handling.
   ChromeViewHostMsg_GetPluginInfo_Output output;
 #if defined(ENABLE_PLUGINS)
+  blink::WebString top_origin = frame->top()->securityOrigin().toString();
   render_frame->Send(
       new ChromeViewHostMsg_GetPluginInfo(render_frame->GetRoutingID(),
                                           GURL(orig_params.url),
-                                          frame->top()->document().url(),
+                                          GURL(top_origin),
                                           orig_mime_type,
                                           &output));
 #else