Introduce DeclarativeUserScriptManager.

extensions/shell/browser/shell_extension_system.cc

Index: extensions/shell/browser/shell_extension_system.cc
diff --git a/extensions/shell/browser/shell_extension_system.cc b/extensions/shell/browser/shell_extension_system.cc
index ef7bc5760f8c5f5ae3589611ab899e9d3064ca5d..58f8b643877f4d6db561febaa95d67cc36f815cf 100644
--- a/extensions/shell/browser/shell_extension_system.cc
+++ b/extensions/shell/browser/shell_extension_system.cc
@@ -121,6 +121,11 @@ SharedUserScriptMaster* ShellExtensionSystem::shared_user_script_master() {
   return NULL;
 }
 
+DeclarativeUserScriptManager*
+ShellExtensionSystem::declarative_user_script_manager() {
+  return NULL;
+}
+
 StateStore* ShellExtensionSystem::state_store() {
   return NULL;
 }
@@ -185,10 +190,4 @@ scoped_ptr<ExtensionSet> ShellExtensionSystem::GetDependentExtensions(
   return make_scoped_ptr(new ExtensionSet());
 }
 
-DeclarativeUserScriptMaster*
-ShellExtensionSystem::GetDeclarativeUserScriptMasterByExtension(
-    const ExtensionId& extension_id) {
-  return NULL;
-}
-
 }  // namespace extensions