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..77d2394e416b689c9d87703f65d24eab3a857344 100644
--- a/chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc
+++ b/chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc
@@ -46,12 +46,10 @@ scoped_ptr<blink::WebPluginPlaceholder> CreateShadowDOMPlaceholderForPluginInfo(
   // TODO(jbroman): Investigate whether browser plugin needs special handling.
   ChromeViewHostMsg_GetPluginInfo_Output output;
 #if defined(ENABLE_PLUGINS)
-  render_frame->Send(
-      new ChromeViewHostMsg_GetPluginInfo(render_frame->GetRoutingID(),
-                                          GURL(orig_params.url),
-                                          frame->top()->document().url(),
-                                          orig_mime_type,
-                                          &output));
+  blink::WebString top_origin = frame->top()->securityOrigin().toString();
+  render_frame->Send(new ChromeViewHostMsg_GetPluginInfo(
+      render_frame->GetRoutingID(), GURL(orig_params.url), GURL(top_origin),
+      orig_mime_type, &output));
 #else
   output.status = Status::kNotFound;
 #endif