Small cleanup to extension function registration to avoid scattered definitions.

chrome/browser/extensions/extension_toolstrip_api.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_EXTENSION_TOOLSTRIP_API_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_TOOLSTRIP_API_H_
 
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/browser/extensions/extension_shelf_model.h"
 
 class Profile;
 
-// Function names.
-namespace extension_toolstrip_api_functions {
-  extern const char kExpandFunction[];
-  extern const char kCollapseFunction[];
-};  // namespace extension_toolstrip_api_functions
-
 namespace extension_toolstrip_api_events {
   extern const char kOnToolstripExpanded[];
   extern const char kOnToolstripCollapsed[];
 };  // namespace extension_toolstrip_api_events
 
 class ToolstripFunction : public SyncExtensionFunction {
  protected:
   virtual bool RunImpl();
 
   ExtensionShelfModel* model_;
   ExtensionShelfModel::iterator toolstrip_;
 };
 
 class ToolstripExpandFunction : public ToolstripFunction {
   virtual bool RunImpl();
+  DECLARE_EXTENSION_FUNCTION_NAME("toolstrip.expand")
 };
 
 class ToolstripCollapseFunction : public ToolstripFunction {
   virtual bool RunImpl();
+  DECLARE_EXTENSION_FUNCTION_NAME("toolstrip.collapse")
 };
 
 class ToolstripEventRouter {
  public:
   // Toolstrip events.
   static void OnToolstripExpanded(Profile* profile,
                                   int routing_id,
                                   const GURL& url,
                                   int height);
   static void OnToolstripCollapsed(Profile* profile,
                                    int routing_id,
                                    const GURL& url);
 
  private:
   // Helper to actually dispatch an event to extension listeners.
   static void DispatchEvent(Profile* profile,
                             int routing_id,
                             const char* event_name,
                             const Value& json);
 
   DISALLOW_COPY_AND_ASSIGN(ToolstripEventRouter);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_TOOLSTRIP_API_H_