Move DeclarativeUserScriptManager/Master and UserScriptLoader to //extensions.

extensions/browser/extension_user_script_loader.h

 // Copyright 2015 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_EXTENSION_USER_SCRIPT_LOADER_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTENSION_USER_SCRIPT_LOADER_H_
+#ifndef EXTENSIONS_BROWSER_EXTENSION_USER_SCRIPT_LOADER_H_
+#define EXTENSIONS_BROWSER_EXTENSION_USER_SCRIPT_LOADER_H_
 
 #include "base/memory/shared_memory.h"
-#include "chrome/browser/extensions/user_script_loader.h"
 #include "extensions/browser/extension_registry_observer.h"
+#include "extensions/browser/user_script_loader.h"
 #include "extensions/common/extension.h"
 
 namespace content {
 class BrowserContext;
 }
 
-class Profile;
-
 namespace extensions {
 
 class ExtensionRegistry;
 
 // UserScriptLoader for extensions.
 class ExtensionUserScriptLoader : public UserScriptLoader,
                                   public ExtensionRegistryObserver {
  public:
   // The listen_for_extension_system_loaded is only set true when initilizing
   // the Extension System, e.g, when constructs SharedUserScriptMaster in
   // ExtensionSystemImpl.
-  ExtensionUserScriptLoader(Profile* profile,
+  ExtensionUserScriptLoader(content::BrowserContext* browser_context,
                             const HostID& host_id,
                             bool listen_for_extension_system_loaded);
   ~ExtensionUserScriptLoader() override;
 
  private:
   // UserScriptLoader:
   void UpdateHostsInfo(const std::set<HostID>& changed_hosts) override;
   LoadUserScriptsContentFunction GetLoadUserScriptsFunction() override;
 
   // ExtensionRegistryObserver:
   void OnExtensionUnloaded(content::BrowserContext* browser_context,
                            const Extension* extension,
                            UnloadedExtensionInfo::Reason reason) override;
 
   // Initiates script load when we have been waiting for the extension system
   // to be ready.
   void OnExtensionSystemReady();
 
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
   base::WeakPtrFactory<ExtensionUserScriptLoader> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionUserScriptLoader);
 };
 
 }  // namespace extensions
 
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_USER_SCRIPT_LOADER_H_
+#endif  // EXTENSIONS_BROWSER_EXTENSION_USER_SCRIPT_LOADER_H_