Remove unused in-process pepper APIs

ppapi/thunk/resource_creation_api.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 PPAPI_THUNK_RESOURCE_CREATION_API_H_
 #define PPAPI_THUNK_RESOURCE_CREATION_API_H_
 
 #include "base/memory/shared_memory.h"
 #include "ppapi/c/dev/pp_video_dev.h"
 #include "ppapi/c/dev/ppb_file_chooser_dev.h"
@@ skipping 175 matching lines @@
   virtual PP_Resource CreateFlashDRM(PP_Instance instance) = 0;
   virtual PP_Resource CreateFlashFontFile(
       PP_Instance instance,
       const PP_BrowserFont_Trusted_Description* description,
       PP_PrivateFontCharset charset) = 0;
   virtual PP_Resource CreateFlashMenu(PP_Instance instance,
                                       const PP_Flash_Menu* menu_data) = 0;
   virtual PP_Resource CreateFlashMessageLoop(PP_Instance instance) = 0;
   virtual PP_Resource CreatePlatformVerificationPrivate(
       PP_Instance instance) = 0;
-  virtual PP_Resource CreateScrollbar(PP_Instance instance,
-                                      PP_Bool vertical) = 0;
   virtual PP_Resource CreateVideoCapture(PP_Instance instance) = 0;
   virtual PP_Resource CreateVideoDecoderDev(
       PP_Instance instance,
       PP_Resource context3d_id,
       PP_VideoDecoder_Profile profile) = 0;
 #endif  // !defined(OS_NACL)
 
   static const ApiID kApiID = API_ID_RESOURCE_CREATION;
 };
 
 }  // namespace thunk
 }  // namespace ppapi
 
 #endif  // PPAPI_THUNK_RESOURCE_CREATION_API_H_