Merge to XFA: Do not call into formfiller code with a NULL PageView.

fpdfsdk/include/formfiller/FFL_FormFiller.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 FPDFSDK_INCLUDE_FORMFILLER_FFL_FORMFILLER_H_
 #define FPDFSDK_INCLUDE_FORMFILLER_FFL_FORMFILLER_H_
 
 #include "FFL_IFormFiller.h"
@@ skipping 58 matching lines @@
   virtual FX_BOOL OnRButtonUp(CPDFSDK_PageView* pPageView,
                               CPDFSDK_Annot* pAnnot,
                               FX_UINT nFlags,
                               const CPDF_Point& point);
 
   virtual FX_BOOL OnKeyDown(CPDFSDK_Annot* pAnnot,
                             FX_UINT nKeyCode,
                             FX_UINT nFlags);
   virtual FX_BOOL OnChar(CPDFSDK_Annot* pAnnot, FX_UINT nChar, FX_UINT nFlags);
 
-  FX_BOOL SetFocusForAnnot(CPDFSDK_Annot* pAnnot, FX_UINT nFlag);
-  FX_BOOL KillFocusForAnnot(CPDFSDK_Annot* pAnnot, FX_UINT nFlag);
+  void SetFocusForAnnot(CPDFSDK_Annot* pAnnot, FX_UINT nFlag);
+  void KillFocusForAnnot(CPDFSDK_Annot* pAnnot, FX_UINT nFlag);
 
   // CPWL_TimerHandler
   void TimerProc() override;
   IFX_SystemHandler* GetSystemHandler() const override;
 
   // IPWL_Provider
   CPDF_Matrix GetWindowMatrix(void* pAttachedData) override;
   CFX_WideString LoadPopupMenuString(int nIndex) override;
 
   virtual void GetActionData(CPDFSDK_PageView* pPageView,
@@ skipping 98 matching lines @@
                       CFX_RenderDevice* pDevice,
                       CPDF_Matrix* pUser2Device,
                       FX_DWORD dwFlags) override;
 
  protected:
   FX_BOOL m_bMouseIn;
   FX_BOOL m_bMouseDown;
 };
 
 #endif  // FPDFSDK_INCLUDE_FORMFILLER_FFL_FORMFILLER_H_