Begin to enable extension APIs in Extension Service Worker.

extensions/common/extensions_client.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 "extensions/common/extensions_client.h"
 
 #include "base/logging.h"
 #include "extensions/common/extension_icon_set.h"
 #include "extensions/common/manifest_handlers/icons_handler.h"
 
@@ skipping 10 matching lines @@
   return g_client;
 }
 
 std::set<base::FilePath> ExtensionsClient::GetBrowserImagePaths(
     const Extension* extension) {
   std::set<base::FilePath> paths;
   extensions::IconsInfo::GetIcons(extension).GetPaths(&paths);
   return paths;
 }
 
+bool ExtensionsClient::ExtensionAPIEnabledInExtensionServiceWorkers() const {
+  return false;
+}
+
 void ExtensionsClient::Set(ExtensionsClient* client) {
   // This can happen in unit tests, where the utility thread runs in-process.
   if (g_client)
     return;
   g_client = client;
   g_client->Initialize();
 }
 
 }  // namespace extensions