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

chrome/browser/extensions/extension_declarative_user_script_master.h

-// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// 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_API_SPELLCHECK_SPELLCHECK_API_H_
-#define CHROME_BROWSER_EXTENSIONS_API_SPELLCHECK_SPELLCHECK_API_H_
+#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_DECLARATIVE_USER_SCRIPT_MASTER_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_DECLARATIVE_USER_SCRIPT_MASTER_H_
 
 #include "base/scoped_observer.h"
-#include "extensions/browser/browser_context_keyed_api_factory.h"
+#include "chrome/browser/extensions/declarative_user_script_master.h"
+#include "chrome/browser/extensions/extension_user_script_loader.h"
 #include "extensions/browser/extension_registry_observer.h"
+#include "extensions/common/consumer.h"
+#include "extensions/common/extension.h"
+
+class Profile;
 
 namespace extensions {
+
 class ExtensionRegistry;
+class UserScript;
 
-class SpellcheckAPI : public BrowserContextKeyedAPI,
-                      public ExtensionRegistryObserver {
+// Extension implmentation of DeclarativeUserScriptMaster.
+class ExtensionDeclarativeUserScriptMaster : public DeclarativeUserScriptMaster,
+                                             public ExtensionRegistryObserver {
  public:
-  explicit SpellcheckAPI(content::BrowserContext* context);
-  ~SpellcheckAPI() override;
-
-  // BrowserContextKeyedAPI implementation.
-  static BrowserContextKeyedAPIFactory<SpellcheckAPI>* GetFactoryInstance();
+  ExtensionDeclarativeUserScriptMaster(Profile* profile, const ConsumerID& id);
+  ~ExtensionDeclarativeUserScriptMaster() override;
 
  private:
-  friend class BrowserContextKeyedAPIFactory<SpellcheckAPI>;
-
   // ExtensionRegistryObserver implementation.
-  void OnExtensionLoaded(content::BrowserContext* browser_context,
-                         const Extension* extension) override;
   void OnExtensionUnloaded(content::BrowserContext* browser_context,
                            const Extension* extension,
                            UnloadedExtensionInfo::Reason reason) override;
 
-  // BrowserContextKeyedAPI implementation.
-  static const char* service_name() {
-    return "SpellcheckAPI";
-  }
-
-  // Listen to extension load, unloaded notifications.
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
-  DISALLOW_COPY_AND_ASSIGN(SpellcheckAPI);
+  DISALLOW_COPY_AND_ASSIGN(ExtensionDeclarativeUserScriptMaster);
 };
 
-template <>
-void BrowserContextKeyedAPIFactory<SpellcheckAPI>::DeclareFactoryDependencies();
-
 }  // namespace extensions
 
-#endif  // CHROME_BROWSER_EXTENSIONS_API_SPELLCHECK_SPELLCHECK_API_H_
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_DECLARATIVE_USER_SCRIPT_MASTER_H_