Fix IWYU in formfiller/ directory.

fpdfsdk/include/fsdk_annothandler.h

 // 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
 
 #ifndef _FSDK_ANNOTHANDLER_H_
 #define _FSDK_ANNOTHANDLER_H_
 
+#include "../../core/include/fxcrt/fx_basic.h"
 
+class CFFL_IFormFiller;
+class CFX_RenderDevice;
 class CPDFDoc_Environment;
-class CFFL_IFormFiller;
+class CPDFSDK_Annot;
 class CPDFSDK_PageView;
+class CPDF_Annot;
+class CPDF_Matrix;
+class CPDF_Point;
+class CPDF_Rect;
+
 class IPDFSDK_AnnotHandler
 {
 
 public:
         virtual ~IPDFSDK_AnnotHandler() {};
 
         virtual CFX_ByteString          GetType() = 0;
 
         virtual CFX_ByteString          GetName() = 0;
 
@@ skipping 217 matching lines @@
         CFX_PtrArray         m_pIteratorAnnotList;
         FX_BOOL                      m_bReverse;
         FX_BOOL              m_bIgnoreTopmost;
         FX_BOOL              m_bCircle;
 };
 
 
 
 #endif