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

xfa/src/fwl/theme/pictureboxtp.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/include/fwl/theme/pictureboxtp.h"
 
 #include "xfa/include/fwl/basewidget/fwl_picturebox.h"
 #include "xfa/include/fwl/core/fwl_widget.h"
@@ skipping 16 matching lines @@
     }
     case FWL_PART_PTB_Edge: {
       DrawEdge(pParams->m_pGraphics, pParams->m_pWidget->GetStyles(),
                &pParams->m_rtPart, &pParams->m_matrix);
       break;
     }
     default: {}
   }
   return TRUE;
 }