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

chrome/renderer/plugins/shadow_dom_plugin_placeholder.cc

 // Copyright 2013 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.
 
 #include "chrome/renderer/plugins/shadow_dom_plugin_placeholder.h"
 
 #include "base/command_line.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/grit/generated_resources.h"
@@ skipping 28 matching lines @@
     const blink::WebPluginParams& orig_params) {
   using Status = ChromeViewHostMsg_GetPluginInfo_Status;
 
   if (!ShadowDOMPluginPlaceholderEnabled())
     return nullptr;
 
   std::string orig_mime_type = orig_params.mimeType.utf8();
   // 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
   output.status = Status::kNotFound;
 #endif
 
   if (output.status == Status::kNotFound) {
     // TODO(jbroman): Handle YouTube specially here, as in
     // ChromeContentRendererClient::CreatePlugin.
     PluginUMAReporter::GetInstance()->ReportPluginMissing(orig_mime_type,
                                                           orig_params.url);
     return CreateShadowDOMPlaceholderForMissingPlugin();
   }
 
   return nullptr;
 }
 
 scoped_ptr<blink::WebPluginPlaceholder>
 CreateShadowDOMPlaceholderForMissingPlugin() {
   return make_scoped_ptr(new MissingPluginPlaceholder);
 }