Revert of Revert of Introduce HostID and de-couple Extensions from "script injection System" [browser side]

chrome/browser/extensions/shared_user_script_master.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_SHARED_USER_SCRIPT_MASTER_H_
 #define CHROME_BROWSER_EXTENSIONS_SHARED_USER_SCRIPT_MASTER_H_
 
 #include <set>
 
 #include "base/scoped_observer.h"
-#include "chrome/browser/extensions/user_script_loader.h"
+#include "chrome/browser/extensions/extension_user_script_loader.h"
 #include "extensions/browser/extension_registry_observer.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/user_script.h"
 
 namespace content {
 class BrowserContext;
 }
 
 class Profile;
 
@@ skipping 19 matching lines @@
   void OnExtensionUnloaded(content::BrowserContext* browser_context,
                            const Extension* extension,
                            UnloadedExtensionInfo::Reason reason) override;
 
   // Gets an extension's scripts' metadata; i.e., gets a list of UserScript
   // objects that contains script info, but not the contents of the scripts.
   const std::set<UserScript> GetScriptsMetadata(const Extension* extension);
 
   // Script loader that handles loading contents of scripts into shared memory
   // and notifying renderers of scripts in shared memory.
-  UserScriptLoader loader_;
+  ExtensionUserScriptLoader loader_;
 
   // The profile for which the scripts managed here are installed.
   Profile* profile_;
 
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(SharedUserScriptMaster);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_SHARED_USER_SCRIPT_MASTER_H_