Add a virtual keyboard webui at chrome://keyboard/

chrome/browser/extensions/component_loader.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_COMPONENT_LOADER_H_
 #define CHROME_BROWSER_EXTENSIONS_COMPONENT_LOADER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 109 matching lines @@
   void AddImageLoaderExtension();
 
 #if defined(OS_CHROMEOS)
   void AddGaiaAuthExtension();
 #endif
 
   // Add the enterprise webstore extension, or reload it if already loaded.
   void AddOrReloadEnterpriseWebStore();
 
   void AddChromeApp();
+  void AddKeyboardApp();
 
   // Unloads |component| from the memory.
   void UnloadComponent(ComponentExtensionInfo* component);
 
   PrefService* profile_prefs_;
   PrefService* local_state_;
 
   ExtensionServiceInterface* extension_service_;
 
   // List of registered component extensions (see Manifest::Location).
   typedef std::vector<ComponentExtensionInfo> RegisteredComponentExtensions;
   RegisteredComponentExtensions component_extensions_;
 
   PrefChangeRegistrar pref_change_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ComponentLoader);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_COMPONENT_LOADER_H_