Remove the GetCaption dataprovider method

xfa/fwl/core/cfwl_notedriver.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/cfwl_notedriver.h"
 
 #include <utility>
 
 #include "core/fxcrt/fx_ext.h"
 #include "third_party/base/ptr_util.h"
 #include "third_party/base/stl_util.h"
 #include "xfa/fwl/core/cfwl_eventtarget.h"
 #include "xfa/fwl/core/cfwl_msgkey.h"
 #include "xfa/fwl/core/cfwl_msgkillfocus.h"
 #include "xfa/fwl/core/cfwl_msgmouse.h"
 #include "xfa/fwl/core/cfwl_msgmousewheel.h"
 #include "xfa/fwl/core/cfwl_msgsetfocus.h"
 #include "xfa/fwl/core/cfwl_noteloop.h"
 #include "xfa/fwl/core/cfwl_widgetmgr.h"
 #include "xfa/fwl/core/ifwl_app.h"
-#include "xfa/fwl/core/ifwl_tooltip.h"
+#include "xfa/fwl/core/ifwl_form.h"
 
 CFWL_NoteDriver::CFWL_NoteDriver()
     : m_pHover(nullptr),
       m_pFocus(nullptr),
       m_pGrab(nullptr),
       m_pNoteLoop(pdfium::MakeUnique<CFWL_NoteLoop>()) {
   PushNoteLoop(m_pNoteLoop.get());
 }
 
 CFWL_NoteDriver::~CFWL_NoteDriver() {
@@ skipping 445 matching lines @@
 void CFWL_NoteDriver::ClearEventTargets(bool bRemoveAll) {
   auto it = m_eventTargets.begin();
   while (it != m_eventTargets.end()) {
     auto old = it++;
     if (old->second && (bRemoveAll || old->second->IsInvalid())) {
       delete old->second;
       m_eventTargets.erase(old);
     }
   }
 }