Use mojo from the PDF extension instead of using an extension API.

extensions/renderer/dispatcher.cc

 // Copyright 2014 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 "extensions/renderer/dispatcher.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 751 matching lines @@
       std::make_pair(mojo::kConnectionModuleName, IDR_MOJO_CONNECTION_JS));
   resources.push_back(
       std::make_pair(mojo::kConnectorModuleName, IDR_MOJO_CONNECTOR_JS));
   resources.push_back(
       std::make_pair(mojo::kRouterModuleName, IDR_MOJO_ROUTER_JS));
   resources.push_back(
       std::make_pair(mojo::kUnicodeModuleName, IDR_MOJO_UNICODE_JS));
   resources.push_back(
       std::make_pair(mojo::kValidatorModuleName, IDR_MOJO_VALIDATOR_JS));
   resources.push_back(std::make_pair("async_waiter", IDR_ASYNC_WAITER_JS));
-  resources.push_back(std::make_pair("keep_alive", IDR_KEEP_ALIVE_JS));
   resources.push_back(std::make_pair("extensions/common/mojo/keep_alive.mojom",
                                      IDR_KEEP_ALIVE_MOJOM_JS));
 
   // Custom bindings.
   resources.push_back(
       std::make_pair("app.runtime", IDR_APP_RUNTIME_CUSTOM_BINDINGS_JS));
   resources.push_back(
       std::make_pair("app.window", IDR_APP_WINDOW_CUSTOM_BINDINGS_JS));
   resources.push_back(
       std::make_pair("declarativeWebRequest",
                      IDR_DECLARATIVE_WEBREQUEST_CUSTOM_BINDINGS_JS));
   resources.push_back(
       std::make_pair("displaySource",
                      IDR_DISPLAY_SOURCE_CUSTOM_BINDINGS_JS));
   resources.push_back(
       std::make_pair("contextMenus", IDR_CONTEXT_MENUS_CUSTOM_BINDINGS_JS));
   resources.push_back(
       std::make_pair("contextMenusHandlers", IDR_CONTEXT_MENUS_HANDLERS_JS));
   resources.push_back(
       std::make_pair("extension", IDR_EXTENSION_CUSTOM_BINDINGS_JS));
   resources.push_back(std::make_pair("i18n", IDR_I18N_CUSTOM_BINDINGS_JS));
-  resources.push_back(std::make_pair(
-      "mimeHandlerPrivate", IDR_MIME_HANDLER_PRIVATE_CUSTOM_BINDINGS_JS));
   resources.push_back(std::make_pair("extensions/common/api/mime_handler.mojom",
                                      IDR_MIME_HANDLER_MOJOM_JS));
   resources.push_back(
       std::make_pair("mojoPrivate", IDR_MOJO_PRIVATE_CUSTOM_BINDINGS_JS));
   resources.push_back(
       std::make_pair("permissions", IDR_PERMISSIONS_CUSTOM_BINDINGS_JS));
   resources.push_back(std::make_pair("printerProvider",
                                      IDR_PRINTER_PROVIDER_CUSTOM_BINDINGS_JS));
   resources.push_back(
       std::make_pair("runtime", IDR_RUNTIME_CUSTOM_BINDINGS_JS));
@@ skipping 845 matching lines @@
   // The "guestViewDeny" module must always be loaded last. It registers
   // error-providing custom elements for the GuestView types that are not
   // available, and thus all of those types must have been checked and loaded
   // (or not loaded) beforehand.
   if (context_type == Feature::BLESSED_EXTENSION_CONTEXT) {
     module_system->Require("guestViewDeny");
   }
 }
 
 }  // namespace extensions