Serve mojo WebUI resources from the same origin as the WebUI itself.

chrome/browser/ui/webui/omnibox/omnibox_ui.cc

 // Copyright (c) 2012 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/browser/ui/webui/omnibox/omnibox_ui.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/omnibox/omnibox_ui_handler.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/browser/web_ui_controller.h"
 #include "content/public/browser/web_ui_data_source.h"
 #include "grit/browser_resources.h"
 
 OmniboxUI::OmniboxUI(content::WebUI* web_ui) : MojoWebUIController(web_ui) {
   // Set up the chrome://omnibox/ source.
-  content::WebUIDataSource* html_source =
+  content::WebUIDataSource* source =
       content::WebUIDataSource::Create(chrome::kChromeUIOmniboxHost);
-  html_source->AddResourcePath("omnibox.css", IDR_OMNIBOX_CSS);
-  html_source->AddResourcePath("omnibox.js", IDR_OMNIBOX_JS);
-  html_source->SetDefaultResource(IDR_OMNIBOX_HTML);
+  source->AddResourcePath("omnibox.css", IDR_OMNIBOX_CSS);
+  source->AddResourcePath("omnibox.js", IDR_OMNIBOX_JS);
+  source->AddResourcePath("chrome/browser/ui/webui/omnibox/omnibox.mojom",
+                          IDR_OMNIBOX_MOJO_JS);
+  source->AddMojoResources();
+  source->SetDefaultResource(IDR_OMNIBOX_HTML);
 
-  content::WebUIDataSource::Add(Profile::FromWebUI(web_ui), html_source);
-
-  AddMojoResourcePath("chrome/browser/ui/webui/omnibox/omnibox.mojom",
-                      IDR_OMNIBOX_MOJO_JS);
+  content::WebUIDataSource::Add(Profile::FromWebUI(web_ui), source);
 }
 
 OmniboxUI::~OmniboxUI() {}
 
 void OmniboxUI::BindUIHandler(
     mojo::InterfaceRequest<OmniboxUIHandlerMojo> request) {
   // OmniboxUIHandler deletes itself when the pipe is closed.
   new OmniboxUIHandler(Profile::FromWebUI(web_ui()), request.Pass());
 }