Move xfa/fwl/core to xfa/fwl.

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/cfwl_widget.h"
-#include "xfa/fwl/core/ifwl_widgetdelegate.h"
-
-CFWL_EventTarget::CFWL_EventTarget(CFWL_Widget* pListener)
-    : m_pListener(pListener), m_bInvalid(false) {}
-
-CFWL_EventTarget::~CFWL_EventTarget() {}
-
-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;
-}