Cleanup IFWL_Adapter interfaces.

xfa/fwl/core/ifwl_widget.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 XFA_FWL_CORE_IFWL_WIDGET_H_
 #define XFA_FWL_CORE_IFWL_WIDGET_H_
 
 #include <memory>
@@ skipping 35 matching lines @@
   IFWL_Widget* GetParent();
   FWL_ERR SetParent(IFWL_Widget* pParent);
   IFWL_Widget* GetOwner();
   FWL_ERR SetOwner(IFWL_Widget* pOwner);
   IFWL_Widget* GetOuter();
   uint32_t GetStyles();
   FWL_ERR ModifyStyles(uint32_t dwStylesAdded, uint32_t dwStylesRemoved);
   uint32_t GetStylesEx();
   FWL_ERR ModifyStylesEx(uint32_t dwStylesExAdded, uint32_t dwStylesExRemoved);
   uint32_t GetStates();
-  FWL_ERR SetStates(uint32_t dwStates, FX_BOOL bSet = TRUE);
+  void SetStates(uint32_t dwStates, FX_BOOL bSet = TRUE);
   FWL_ERR SetPrivateData(void* module_id,
                          void* pData,
                          PD_CALLBACK_FREEDATA callback);
   void* GetPrivateData(void* module_id);
   FWL_ERR Update();
   FWL_ERR LockUpdate();
   FWL_ERR UnlockUpdate();
   FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
   FWL_ERR TransformTo(IFWL_Widget* pWidget, FX_FLOAT& fx, FX_FLOAT& fy);
   FWL_ERR TransformTo(IFWL_Widget* pWidget, CFX_RectF& rt);
@@ skipping 19 matching lines @@
 
  protected:
   // Takes ownership of |pImpl|.
   void SetImpl(CFWL_WidgetImp* pImpl) { m_pImpl.reset(pImpl); }
 
  private:
   std::unique_ptr<CFWL_WidgetImp> m_pImpl;
 };
 
 #endif  // XFA_FWL_CORE_IFWL_WIDGET_H_