Convert FWL_ERR into an enum class.

xfa/fwl/lightwidget/cfwl_picturebox.h

Index: xfa/fwl/lightwidget/cfwl_picturebox.h
diff --git a/xfa/fwl/lightwidget/cfwl_picturebox.h b/xfa/fwl/lightwidget/cfwl_picturebox.h
index 8fa985acd897d8fc1ec4f70711bbf5b76eb8b7bb..8b0b13de24cc52780dec3b748919a3183d36f4e5 100644
--- a/xfa/fwl/lightwidget/cfwl_picturebox.h
+++ b/xfa/fwl/lightwidget/cfwl_picturebox.h
@@ -14,19 +14,19 @@
 class CFWL_PictureBox : public CFWL_Widget {
  public:
   static CFWL_PictureBox* Create();
-  FWL_ERR Initialize(const CFWL_WidgetProperties* pProperties = NULL);
+  FWL_Error Initialize(const CFWL_WidgetProperties* pProperties = NULL);
   CFX_DIBitmap* GetPicture();
-  FWL_ERR SetPicture(CFX_DIBitmap* pBitmap);
+  FWL_Error SetPicture(CFX_DIBitmap* pBitmap);
   FX_FLOAT GetRotation();
-  FWL_ERR SetRotation(FX_FLOAT fRotation);
+  FWL_Error SetRotation(FX_FLOAT fRotation);
   int32_t GetFlipMode();
-  FWL_ERR SetFlipMode(int32_t iFlipMode);
+  FWL_Error SetFlipMode(int32_t iFlipMode);
   int32_t GetOpacity();
-  FWL_ERR SetOpacity(int32_t iOpacity);
-  FWL_ERR GetScale(FX_FLOAT& fScaleX, FX_FLOAT& fScaleY);
-  FWL_ERR SetScale(FX_FLOAT fScaleX, FX_FLOAT fScaleY);
-  FWL_ERR GetOffset(FX_FLOAT& fx, FX_FLOAT& fy);
-  FWL_ERR SetOffset(FX_FLOAT fx, FX_FLOAT fy);
+  FWL_Error SetOpacity(int32_t iOpacity);
+  FWL_Error GetScale(FX_FLOAT& fScaleX, FX_FLOAT& fScaleY);
+  FWL_Error SetScale(FX_FLOAT fScaleX, FX_FLOAT fScaleY);
+  FWL_Error GetOffset(FX_FLOAT& fx, FX_FLOAT& fy);
+  FWL_Error SetOffset(FX_FLOAT fx, FX_FLOAT fy);
   CFWL_PictureBox();
   virtual ~CFWL_PictureBox();
 
@@ -41,13 +41,14 @@ class CFWL_PictureBox : public CFWL_Widget {
       m_fOffSetY = 0.0f;
       m_pBitmap = NULL;
     }
-    virtual FWL_ERR GetCaption(IFWL_Widget* pWidget, CFX_WideString& wsCaption);
+    virtual FWL_Error GetCaption(IFWL_Widget* pWidget,
+                                 CFX_WideString& wsCaption);
     virtual CFX_DIBitmap* GetPicture(IFWL_Widget* pWidget);
     virtual CFX_DIBitmap* GetErrorPicture(IFWL_Widget* pWidget);
     virtual CFX_DIBitmap* GetInitialPicture(IFWL_Widget* pWidget);
     virtual int32_t GetOpacity(IFWL_Widget* pWidget);
     virtual int32_t GetFlipMode(IFWL_Widget* pWidget);
-    virtual FWL_ERR GetMatrix(IFWL_Widget* pWidget, CFX_Matrix& matrix);
+    virtual FWL_Error GetMatrix(IFWL_Widget* pWidget, CFX_Matrix& matrix);
     CFX_DIBitmap* m_pBitmap;
     int32_t m_iOpacity;
     int32_t m_iFlipMode;