Begin to enable extension APIs in Extension Service Worker.

chrome/common/chrome_content_client.h

 // 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.
 
 #ifndef CHROME_COMMON_CHROME_CONTENT_CLIENT_H_
 #define CHROME_COMMON_CHROME_CONTENT_CLIENT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 69 matching lines @@
 #if defined(OS_MACOSX)
   bool GetSandboxProfileForSandboxType(
       int sandbox_type,
       int* sandbox_profile_resource_id) const override;
 #endif
 
   void AddSecureSchemesAndOrigins(std::set<std::string>* schemes,
                                   std::set<GURL>* origins) override;
 
   void AddServiceWorkerSchemes(std::set<std::string>* schemes) override;
+  bool AllowScriptExtensionForServiceWorker(const GURL& script_url) override;
 
   bool IsSupplementarySiteIsolationModeEnabled() override;
   base::StringPiece GetOriginTrialPublicKey() override;
 
   OriginTrialKeyManager* origin_trial_key_manager() {
     return &origin_trial_key_manager_;
   }
 
 #if defined(OS_ANDROID)
   media::MediaClientAndroid* GetMediaClientAndroid() override;
 #endif  // OS_ANDROID
 
  private:
   OriginTrialKeyManager origin_trial_key_manager_;
 };
 
 #endif  // CHROME_COMMON_CHROME_CONTENT_CLIENT_H_