Move the message definitions to their own files.

xfa/fxfa/app/xfa_ffapp.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/fxfa/xfa_ffapp.h"
 
 #include <algorithm>
 #include <utility>
@@ skipping 116 matching lines @@
 CXFA_FWLTheme* CXFA_FFApp::GetFWLTheme() {
   if (!m_pFWLTheme)
     m_pFWLTheme.reset(new CXFA_FWLTheme(this));
   return m_pFWLTheme.get();
 }
 
 CXFA_FWLAdapterWidgetMgr* CXFA_FFApp::GetWidgetMgr(
     IFWL_WidgetMgrDelegate* pDelegate) {
   if (!m_pAdapterWidgetMgr) {
     m_pAdapterWidgetMgr.reset(new CXFA_FWLAdapterWidgetMgr);
-    pDelegate->OnSetCapability(FWL_WGTMGR_DisableThread |
-                               FWL_WGTMGR_DisableForm);
+    pDelegate->OnSetCapability(FWL_WGTMGR_DisableForm);
     m_pWidgetMgrDelegate = pDelegate;
   }
   return m_pAdapterWidgetMgr.get();
 }
 
 IFWL_AdapterTimerMgr* CXFA_FFApp::GetTimerMgr() const {
   return m_pProvider->GetTimerMgr();
 }
 
 void CXFA_FFApp::ClearEventTargets() {
   m_pFWLApp->GetNoteDriver()->ClearEventTargets(false);
 }