Detach the dependency from host_content_settings_map to extension.

chrome/browser/extensions/extension_service.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_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 15 matching lines @@
 #include "extensions/browser/management_policy.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/browser/uninstall_reason.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_set.h"
 #include "extensions/common/manifest.h"
 #include "sync/api/string_ordinal.h"
 
 class ExtensionSyncService;
 class GURL;
+class HostContentSettingsMap;
 class Profile;
 
 namespace base {
 class CommandLine;
 class SequencedTaskRunner;
 class Version;
 }
 
 namespace content {
 class DevToolsAgentHost;
@@ skipping 312 matching lines @@
   // NOTE: If this is ever called with high frequency, the implementation may
   // need to be made more efficient.
   static void RecordPermissionMessagesHistogram(
       const extensions::Extension* extension, const char* histogram);
 
   // Unloads the given extension and mark the extension as terminated. This
   // doesn't notify the user that the extension was terminated, if such a
   // notification is desired the calling code is responsible for doing that.
   void TerminateExtension(const std::string& extension_id);
 
+  // Register self and content settings API with the specified map.
+  void RegisterContentSettings(
+      HostContentSettingsMap* host_content_settings_map);
+
   // Adds/Removes update observers.
   void AddUpdateObserver(extensions::UpdateObserver* observer);
   void RemoveUpdateObserver(extensions::UpdateObserver* observer);
 
   //////////////////////////////////////////////////////////////////////////////
   // Simple Accessors
 
   // Returns a WeakPtr to the ExtensionService.
   base::WeakPtr<ExtensionService> AsWeakPtr() { return base::AsWeakPtr(this); }
 
@@ skipping 352 matching lines @@
                            GreylistedExtensionDisabled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistDontEnableManuallyDisabled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistUnknownDontChange);
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionService);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_