Begin to enable extension APIs in Extension Service Worker.

content/public/common/content_client.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 "content/public/common/content_client.h"
 
 #include "base/logging.h"
 #include "base/strings/string_piece.h"
 #include "build/build_config.h"
 #include "content/public/common/origin_util.h"
@@ skipping 105 matching lines @@
 #endif
 
 bool ContentClient::IsSupplementarySiteIsolationModeEnabled() {
   return false;
 }
 
 base::StringPiece ContentClient::GetOriginTrialPublicKey() {
   return base::StringPiece();
 }
 
+bool ContentClient::AllowScriptExtensionForServiceWorker(
+    const GURL& script_url) {
+  return false;
+}
+
 #if defined(OS_ANDROID)
 bool ContentClient::UsingSynchronousCompositing() {
   return false;
 }
 
 media::MediaClientAndroid* ContentClient::GetMediaClientAndroid() {
   return nullptr;
 }
 #endif  // OS_ANDROID
 
 }  // namespace content