Convert FWL_ERR into an enum class.

xfa/fxgraphics/cfx_path.h

 // Copyright 2016 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_FXGRAPHICS_CFX_PATH_H_
 #define XFA_FXGRAPHICS_CFX_PATH_H_
 
 #include "core/fxcrt/include/fx_system.h"
 #include "xfa/fxgraphics/include/cfx_graphics.h"
 
 class CFX_PathData;
 class CFX_PathGenerator;
 
 class CFX_Path {
  public:
   CFX_Path();
   virtual ~CFX_Path();
 
-  FX_ERR Create();
-  FX_ERR MoveTo(FX_FLOAT x, FX_FLOAT y);
-  FX_ERR LineTo(FX_FLOAT x, FX_FLOAT y);
-  FX_ERR BezierTo(FX_FLOAT ctrlX1,
-                  FX_FLOAT ctrlY1,
-                  FX_FLOAT ctrlX2,
-                  FX_FLOAT ctrlY2,
-                  FX_FLOAT toX,
-                  FX_FLOAT toY);
-  FX_ERR ArcTo(FX_FLOAT left,
-               FX_FLOAT top,
-               FX_FLOAT width,
-               FX_FLOAT height,
-               FX_FLOAT startAngle,
-               FX_FLOAT sweepAngle);
-  FX_ERR Close();
+  FWL_Error Create();
+  FWL_Error MoveTo(FX_FLOAT x, FX_FLOAT y);
+  FWL_Error LineTo(FX_FLOAT x, FX_FLOAT y);
+  FWL_Error BezierTo(FX_FLOAT ctrlX1,
+                     FX_FLOAT ctrlY1,
+                     FX_FLOAT ctrlX2,
+                     FX_FLOAT ctrlY2,
+                     FX_FLOAT toX,
+                     FX_FLOAT toY);
+  FWL_Error ArcTo(FX_FLOAT left,
+                  FX_FLOAT top,
+                  FX_FLOAT width,
+                  FX_FLOAT height,
+                  FX_FLOAT startAngle,
+                  FX_FLOAT sweepAngle);
+  FWL_Error Close();
 
-  FX_ERR AddLine(FX_FLOAT x1, FX_FLOAT y1, FX_FLOAT x2, FX_FLOAT y2);
-  FX_ERR AddBezier(FX_FLOAT startX,
-                   FX_FLOAT startY,
-                   FX_FLOAT ctrlX1,
-                   FX_FLOAT ctrlY1,
-                   FX_FLOAT ctrlX2,
-                   FX_FLOAT ctrlY2,
-                   FX_FLOAT endX,
-                   FX_FLOAT endY);
-  FX_ERR AddRectangle(FX_FLOAT left,
-                      FX_FLOAT top,
-                      FX_FLOAT width,
-                      FX_FLOAT height);
-  FX_ERR AddEllipse(FX_FLOAT left,
-                    FX_FLOAT top,
-                    FX_FLOAT width,
-                    FX_FLOAT height);
-  FX_ERR AddEllipse(const CFX_RectF& rect);
-  FX_ERR AddArc(FX_FLOAT left,
-                FX_FLOAT top,
-                FX_FLOAT width,
-                FX_FLOAT height,
-                FX_FLOAT startAngle,
-                FX_FLOAT sweepAngle);
-  FX_ERR AddPie(FX_FLOAT left,
-                FX_FLOAT top,
-                FX_FLOAT width,
-                FX_FLOAT height,
-                FX_FLOAT startAngle,
-                FX_FLOAT sweepAngle);
-  FX_ERR AddSubpath(CFX_Path* path);
-  FX_ERR Clear();
+  FWL_Error AddLine(FX_FLOAT x1, FX_FLOAT y1, FX_FLOAT x2, FX_FLOAT y2);
+  FWL_Error AddBezier(FX_FLOAT startX,
+                      FX_FLOAT startY,
+                      FX_FLOAT ctrlX1,
+                      FX_FLOAT ctrlY1,
+                      FX_FLOAT ctrlX2,
+                      FX_FLOAT ctrlY2,
+                      FX_FLOAT endX,
+                      FX_FLOAT endY);
+  FWL_Error AddRectangle(FX_FLOAT left,
+                         FX_FLOAT top,
+                         FX_FLOAT width,
+                         FX_FLOAT height);
+  FWL_Error AddEllipse(FX_FLOAT left,
+                       FX_FLOAT top,
+                       FX_FLOAT width,
+                       FX_FLOAT height);
+  FWL_Error AddEllipse(const CFX_RectF& rect);
+  FWL_Error AddArc(FX_FLOAT left,
+                   FX_FLOAT top,
+                   FX_FLOAT width,
+                   FX_FLOAT height,
+                   FX_FLOAT startAngle,
+                   FX_FLOAT sweepAngle);
+  FWL_Error AddPie(FX_FLOAT left,
+                   FX_FLOAT top,
+                   FX_FLOAT width,
+                   FX_FLOAT height,
+                   FX_FLOAT startAngle,
+                   FX_FLOAT sweepAngle);
+  FWL_Error AddSubpath(CFX_Path* path);
+  FWL_Error Clear();
 
   FX_BOOL IsEmpty();
   CFX_PathData* GetPathData();
 
  private:
   CFX_PathGenerator* m_generator;
 };
 
 #endif  // XFA_FXGRAPHICS_CFX_PATH_H_