Merge IFWL and CFWL classes.

xfa/fwl/core/cfwl_eventtarget.cpp

 // Copyright 2016 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_eventtarget.h"
 
-#include "xfa/fwl/core/ifwl_widget.h"
+#include "xfa/fwl/core/cfwl_widget.h"
 #include "xfa/fwl/core/ifwl_widgetdelegate.h"
 
-CFWL_EventTarget::CFWL_EventTarget(IFWL_Widget* pListener)
+CFWL_EventTarget::CFWL_EventTarget(CFWL_Widget* pListener)
     : m_pListener(pListener), m_bInvalid(false) {}
 
 CFWL_EventTarget::~CFWL_EventTarget() {}
 
-void CFWL_EventTarget::SetEventSource(IFWL_Widget* pSource) {
+void CFWL_EventTarget::SetEventSource(CFWL_Widget* pSource) {
   if (pSource)
     m_widgets.insert(pSource);
 }
 
 bool CFWL_EventTarget::ProcessEvent(CFWL_Event* pEvent) {
   IFWL_WidgetDelegate* pDelegate = m_pListener->GetDelegate();
   if (!pDelegate)
     return false;
   if (!m_widgets.empty() && m_widgets.count(pEvent->m_pSrcTarget) == 0)
     return false;
 
   pDelegate->OnProcessEvent(pEvent);
   return true;
 }