Convert FWL_ERR into an enum class.

xfa/fwl/core/fwl_sdadapterimp.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_FWL_SDADAPTERIMP_H_
 #define XFA_FWL_CORE_FWL_SDADAPTERIMP_H_
 
 #include "xfa/fwl/core/ifwl_adapterthreadmgr.h"
 #include "xfa/fwl/core/ifwl_adapterwidgetmgr.h"
 
 class CFWL_SDAdapterWidgetMgr : public IFWL_AdapterWidgetMgr {
  public:
   CFWL_SDAdapterWidgetMgr();
   ~CFWL_SDAdapterWidgetMgr();
-  virtual FWL_ERR CreateWidget(IFWL_Widget* pWidget,
-                               IFWL_Widget* pParent = NULL);
-  virtual FWL_ERR DestroyWidget(IFWL_Widget* pWidget);
-  virtual FWL_ERR SetWidgetRect(IFWL_Widget* pWidget, const CFX_RectF& rect);
-  virtual FWL_ERR SetWidgetPosition(IFWL_Widget* pWidget,
-                                    FX_FLOAT fx,
-                                    FX_FLOAT fy);
-  virtual FWL_ERR SetParentWidget(IFWL_Widget* pWidget, IFWL_Widget* pParent);
-  virtual FWL_ERR ShowWidget(IFWL_Widget* pWidget);
-  virtual FWL_ERR HideWidget(IFWL_Widget* pWidget);
-  virtual FWL_ERR SetNormal(IFWL_Widget* pWidget);
-  virtual FWL_ERR SetMaximize(IFWL_Widget* pWidget);
-  virtual FWL_ERR SetMinimize(IFWL_Widget* pWidget);
-  virtual FWL_ERR RunWidget(IFWL_Widget* pWidget);
-  virtual FWL_ERR RepaintWidget(IFWL_Widget* pWidget, const CFX_RectF* pRect);
-  virtual FWL_ERR Exit(int32_t iExitCode);
-  virtual FWL_ERR CreateWidgetWithNativeId(IFWL_Widget* pWidget, void* vp);
+  virtual FWL_Error CreateWidget(IFWL_Widget* pWidget,
+                                 IFWL_Widget* pParent = NULL);
+  virtual FWL_Error DestroyWidget(IFWL_Widget* pWidget);
+  virtual FWL_Error SetWidgetRect(IFWL_Widget* pWidget, const CFX_RectF& rect);
+  virtual FWL_Error SetWidgetPosition(IFWL_Widget* pWidget,
+                                      FX_FLOAT fx,
+                                      FX_FLOAT fy);
+  virtual FWL_Error SetParentWidget(IFWL_Widget* pWidget, IFWL_Widget* pParent);
+  virtual FWL_Error ShowWidget(IFWL_Widget* pWidget);
+  virtual FWL_Error HideWidget(IFWL_Widget* pWidget);
+  virtual FWL_Error SetNormal(IFWL_Widget* pWidget);
+  virtual FWL_Error SetMaximize(IFWL_Widget* pWidget);
+  virtual FWL_Error SetMinimize(IFWL_Widget* pWidget);
+  virtual FWL_Error RunWidget(IFWL_Widget* pWidget);
+  virtual FWL_Error RepaintWidget(IFWL_Widget* pWidget, const CFX_RectF* pRect);
+  virtual FWL_Error Exit(int32_t iExitCode);
+  virtual FWL_Error CreateWidgetWithNativeId(IFWL_Widget* pWidget, void* vp);
   virtual FX_BOOL GetPopupPos(IFWL_Widget* pWidget,
                               FX_FLOAT fMinHeight,
                               FX_FLOAT fMaxHeight,
                               const CFX_RectF& rtAnchor,
                               CFX_RectF& rtPopup);
 
  public:
-  virtual FWL_ERR GetWidgetRect(IFWL_Widget* pWidget, CFX_RectF& rect);
-  virtual FWL_ERR SetWidgetIcon(IFWL_Widget* pWidget,
-                                const CFX_DIBitmap* pIcon,
-                                FX_BOOL bBig);
-  virtual FWL_ERR SetWidgetCaption(IFWL_Widget* pWidget,
-                                   const CFX_WideStringC& wsCaption);
-  virtual FWL_ERR SetBorderRegion(IFWL_Widget* pWidget, CFX_Path* pPath);
-  virtual FWL_ERR SetTransparent(IFWL_Widget* pWidget, uint32_t dwAlpha);
+  virtual FWL_Error GetWidgetRect(IFWL_Widget* pWidget, CFX_RectF& rect);
+  virtual FWL_Error SetWidgetIcon(IFWL_Widget* pWidget,
+                                  const CFX_DIBitmap* pIcon,
+                                  FX_BOOL bBig);
+  virtual FWL_Error SetWidgetCaption(IFWL_Widget* pWidget,
+                                     const CFX_WideStringC& wsCaption);
+  virtual FWL_Error SetBorderRegion(IFWL_Widget* pWidget, CFX_Path* pPath);
+  virtual FWL_Error SetTransparent(IFWL_Widget* pWidget, uint32_t dwAlpha);
   virtual FX_BOOL CheckMessage();
   virtual FX_BOOL IsIdleMessage();
-  virtual FWL_ERR DispatchMessage();
-  virtual FWL_ERR GetWidgetDC(IFWL_Widget* pWidget, void*& pDC);
-  virtual FWL_ERR ReleaseWidgetDC(IFWL_Widget* pWidget,
-                                  void* pDC,
-                                  CFX_RectF* pClip = 0);
+  virtual FWL_Error DispatchMessage();
+  virtual FWL_Error GetWidgetDC(IFWL_Widget* pWidget, void*& pDC);
+  virtual FWL_Error ReleaseWidgetDC(IFWL_Widget* pWidget,
+                                    void* pDC,
+                                    CFX_RectF* pClip = 0);
   virtual void* GetWindow(IFWL_Widget* pWidget);
   virtual uint32_t GetKeyState(uint32_t dwVirtKey);
-  virtual FWL_ERR RunLoop(IFWL_Widget* widget);
-  virtual FWL_ERR EndLoop();
-  virtual FWL_ERR InitMenu(IFWL_Menu* pMenu, IFWL_MenuDP* pMenuData);
-  virtual FWL_ERR UpdateMenu(IFWL_Menu* pMenu,
-                             const void* hItem,
-                             int32_t iType);
-  virtual FWL_ERR SetMessageHook(IFWL_AdapterMessageHook* hook);
-  virtual FWL_ERR GetSystemBorder(FX_FLOAT& l,
-                                  FX_FLOAT& t,
-                                  FX_FLOAT& r,
-                                  FX_FLOAT& b);
+  virtual FWL_Error RunLoop(IFWL_Widget* widget);
+  virtual FWL_Error EndLoop();
+  virtual FWL_Error InitMenu(IFWL_Menu* pMenu, IFWL_MenuDP* pMenuData);
+  virtual FWL_Error UpdateMenu(IFWL_Menu* pMenu,
+                               const void* hItem,
+                               int32_t iType);
+  virtual FWL_Error SetMessageHook(IFWL_AdapterMessageHook* hook);
+  virtual FWL_Error GetSystemBorder(FX_FLOAT& l,
+                                    FX_FLOAT& t,
+                                    FX_FLOAT& r,
+                                    FX_FLOAT& b);
 };
 
 class CFWL_SDAdapterThreadMgr : public IFWL_AdapterThreadMgr {
  public:
   CFWL_SDAdapterThreadMgr();
   ~CFWL_SDAdapterThreadMgr();
 
  public:
   virtual IFWL_App* GetCurrentThread();
 };
 
 #endif  // XFA_FWL_CORE_FWL_SDADAPTERIMP_H_