Cleanup some extern method declarations.

xfa/fwl/core/fwl_noteimp.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/fwl/core/fwl_noteimp.h"
 
 #include "core/fxcrt/include/fx_ext.h"
 #include "xfa/fwl/basewidget/fwl_tooltipctrlimp.h"
@@ skipping 143 matching lines @@
   } else {
     if (!pNote->m_pDstTarget)
       return FALSE;
     IFWL_WidgetDelegate* pDelegate = pNote->m_pDstTarget->SetDelegate(NULL);
     if (pDelegate) {
       pDelegate->OnProcessMessage(static_cast<CFWL_Message*>(pNote));
     }
   }
   return TRUE;
 }
-extern void FWL_PostMessageToMainRoop(CFWL_Message* pMessage);
-FX_BOOL CFWL_NoteDriver::PostMessage(CFWL_Message* pMessage) {
-  FWL_PostMessageToMainRoop(pMessage);
-  return TRUE;
-}
+
 #define FWL_NoteDriver_EventKey 1100
 FWL_ERR CFWL_NoteDriver::RegisterEventTarget(IFWL_Widget* pListener,
                                              IFWL_Widget* pEventSource,
                                              FX_DWORD dwFilter) {
   FX_DWORD dwkey = (FX_DWORD)(uintptr_t)pListener->GetPrivateData(
       (void*)(uintptr_t)FWL_NoteDriver_EventKey);
   if (dwkey == 0) {
     void* random = FX_Random_MT_Start(0);
     dwkey = rand();
     FX_Random_MT_Close(random);
@@ skipping 911 matching lines @@
     return NULL;
   return widget->GetInterface();
 }
 FWL_ERR FWL_SetHook(IFWL_NoteDriver* driver,
                     FWLMessageHookCallback callback,
                     void* info) {
   CFWL_NoteDriver* noteDriver = static_cast<CFWL_NoteDriver*>(driver);
   noteDriver->SetHook(callback, info);
   return FWL_ERR_Succeeded;
 }