Make code compile with clang_use_chrome_plugin (part VI)

xfa/fwl/core/cfwl_widgetmgr.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_widgetmgr.h"
 
 #include "xfa/fwl/core/cfwl_message.h"
 #include "xfa/fwl/core/fwl_appimp.h"
@@ skipping 841 matching lines @@
     temp.Deflate(50, 50);
     if (!temp.Contains(r))
       return FALSE;
 
     pItem->bOutsideChanged = FALSE;
   }
 #endif
 
   return pItem->iRedrawCounter == 0;
 }
+
+CFWL_WidgetMgrItem::CFWL_WidgetMgrItem() : CFWL_WidgetMgrItem(nullptr) {}
+
+CFWL_WidgetMgrItem::CFWL_WidgetMgrItem(IFWL_Widget* widget)
+    : pParent(nullptr),
+      pOwner(nullptr),
+      pChild(nullptr),
+      pPrevious(nullptr),
+      pNext(nullptr),
+      pWidget(widget),
+      iRedrawCounter(0)
+#if (_FX_OS_ == _FX_WIN32_DESKTOP_) || (_FX_OS_ == _FX_WIN64_)
+      ,
+      bOutsideChanged(FALSE)
+#endif
+{
+}
+
+CFWL_WidgetMgrItem::~CFWL_WidgetMgrItem() {}