Mojo JS bindings: add support to generate "dual-mode" code.

chrome/browser/ui/webui/usb_internals/usb_internals_ui.cc

 // Copyright 2016 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/usb_internals/usb_internals_ui.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/usb_internals/usb_internals_page_handler.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/browser_resources.h"
 #include "content/public/browser/web_ui_data_source.h"
 
 UsbInternalsUI::UsbInternalsUI(content::WebUI* web_ui)
     : MojoWebUIController(web_ui) {
   // Set up the chrome://usb-internals source.
   content::WebUIDataSource* source =
       content::WebUIDataSource::Create(chrome::kChromeUIUsbInternalsHost);
   source->AddResourcePath("usb_internals.css", IDR_USB_INTERNALS_CSS);
   source->AddResourcePath("usb_internals.js", IDR_USB_INTERNALS_JS);
   source->AddResourcePath(
-      "chrome/browser/ui/webui/usb_internals/usb_internals.mojom",
+      "chrome/browser/ui/webui/usb_internals/usb_internals.mojom.js",
       IDR_USB_INTERNALS_MOJO_JS);
-  source->AddResourcePath("url/mojo/origin.mojom", IDR_ORIGIN_MOJO_JS);
-  source->AddResourcePath("url/mojo/url.mojom", IDR_URL_MOJO_JS);
+  source->AddResourcePath("url/mojo/origin.mojom.js", IDR_ORIGIN_MOJO_JS);
+  source->AddResourcePath("url/mojo/url.mojom.js", IDR_URL_MOJO_JS);
   source->SetDefaultResource(IDR_USB_INTERNALS_HTML);
   source->UseGzip(std::unordered_set<std::string>());
 
   content::WebUIDataSource::Add(Profile::FromWebUI(web_ui), source);
 }
 
 UsbInternalsUI::~UsbInternalsUI() {}
 
 void UsbInternalsUI::BindUIHandler(
     const service_manager::BindSourceInfo& source_info,
     mojom::UsbInternalsPageHandlerRequest request) {
   page_handler_.reset(new UsbInternalsPageHandler(std::move(request)));
 }