Remove xfa/src/fwl/src and move code up a level.

xfa/src/fwl/core/fwl_widgetmgrimp.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/src/fwl/src/core/fwl_widgetmgrimp.h"
+#include "xfa/src/fwl/core/fwl_widgetmgrimp.h"
 
 #include "xfa/include/fwl/adapter/fwl_adapternative.h"
 #include "xfa/include/fwl/adapter/fwl_adapterwidgetmgr.h"
 #include "xfa/include/fwl/core/fwl_app.h"
 #include "xfa/include/fwl/core/fwl_form.h"
-#include "xfa/src/fwl/src/core/fwl_appimp.h"
-#include "xfa/src/fwl/src/core/fwl_noteimp.h"
-#include "xfa/src/fwl/src/core/fwl_targetimp.h"
-#include "xfa/src/fwl/src/core/fwl_threadimp.h"
-#include "xfa/src/fwl/src/core/fwl_widgetimp.h"
+#include "xfa/src/fwl/core/fwl_appimp.h"
+#include "xfa/src/fwl/core/fwl_noteimp.h"
+#include "xfa/src/fwl/core/fwl_targetimp.h"
+#include "xfa/src/fwl/core/fwl_threadimp.h"
+#include "xfa/src/fwl/core/fwl_widgetimp.h"
 
 FX_BOOL FWL_UseOffscreen(IFWL_Widget* pWidget) {
 #if (_FX_OS_ == _FX_MACOSX_)
   return FALSE;
 #else
   return pWidget->GetStyles() & FWL_WGTSTYLE_Offscreen;
 #endif
 }
 IFWL_WidgetMgr* FWL_GetWidgetMgr() {
   IFWL_App* pApp = FWL_GetApp();
@@ skipping 1038 matching lines @@
     if (child == find) {
       return TRUE;
     }
     if (FWL_WidgetIsChild(child, find)) {
       return TRUE;
     }
     child = FWL_GetWidgetMgr()->GetWidget(child, FWL_WGTRELATION_NextSibling);
   }
   return FALSE;
 }