Small cleanup to extension function registration to avoid scattered definitions.

chrome/browser/extensions/execute_code_in_tab_function.h

 // Copyright (c) 2009 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_EXECUTE_CODE_IN_TAB_FUNCTION_H__
 #define CHROME_BROWSER_EXTENSIONS_EXECUTE_CODE_IN_TAB_FUNCTION_H__
 
 #include <string>
 #include <vector>
 
@@ skipping 28 matching lines @@
   NotificationRegistrar registrar_;
 
   // Id of tab which executes code.
   int execute_tab_id_;
 
   // Contains extension resource built from path of file which is
   // specified in JSON arguments.
   ExtensionResource resource_;
 };
 
+class TabsExecuteScriptFunction : public ExecuteCodeInTabFunction {
+  DECLARE_EXTENSION_FUNCTION_NAME("tabs.executeScript")
+};
+
+class TabsInsertCSSFunction : public ExecuteCodeInTabFunction {
+  DECLARE_EXTENSION_FUNCTION_NAME("tabs.insertCSS")
+};
+
 #endif  // CHROME_BROWSER_EXTENSIONS_EXECUTE_CODE_IN_TAB_FUNCTION_H__