Cleanup remaining IFWL files for visiblity and usage.

xfa/fwl/core/cfwl_picturebox.h

Index: xfa/fwl/core/cfwl_picturebox.h
diff --git a/xfa/fwl/core/cfwl_picturebox.h b/xfa/fwl/core/cfwl_picturebox.h
index 1efa0ad151a4a4f0d88160deb290b9583ee3ab61..861372149e2fdbe7d8b09e04e7ba8c76a2af3dc7 100644
--- a/xfa/fwl/core/cfwl_picturebox.h
+++ b/xfa/fwl/core/cfwl_picturebox.h
@@ -18,6 +18,17 @@ class CFWL_PictureBox : public CFWL_Widget, public IFWL_PictureBoxDP {
 
   void Initialize();
 
+  // IFWL_DataProvider
+  void GetCaption(IFWL_Widget* pWidget, CFX_WideString& wsCaption) override;
+
+  // IFWL_PictureBoxDP
+  CFX_DIBitmap* GetPicture(IFWL_Widget* pWidget) override;
+  CFX_DIBitmap* GetErrorPicture(IFWL_Widget* pWidget) override;
+  CFX_DIBitmap* GetInitialPicture(IFWL_Widget* pWidget) override;
+  int32_t GetOpacity(IFWL_Widget* pWidget) override;
+  int32_t GetFlipMode(IFWL_Widget* pWidget) override;
+  void GetMatrix(IFWL_Widget* pWidget, CFX_Matrix& matrix) override;
+
   CFX_DIBitmap* GetPicture();
   FWL_Error SetPicture(CFX_DIBitmap* pBitmap);
   FX_FLOAT GetRotation();
@@ -31,16 +42,6 @@ class CFWL_PictureBox : public CFWL_Widget, public IFWL_PictureBoxDP {
   FWL_Error GetOffset(FX_FLOAT& fx, FX_FLOAT& fy);
   FWL_Error SetOffset(FX_FLOAT fx, FX_FLOAT fy);
 
-  // IFWL_DataProvider
-  void GetCaption(IFWL_Widget* pWidget, CFX_WideString& wsCaption) override;
-
-  // IFWL_PictureBoxDP
-  CFX_DIBitmap* GetPicture(IFWL_Widget* pWidget) override;
-  CFX_DIBitmap* GetErrorPicture(IFWL_Widget* pWidget) override;
-  CFX_DIBitmap* GetInitialPicture(IFWL_Widget* pWidget) override;
-  int32_t GetOpacity(IFWL_Widget* pWidget) override;
-  int32_t GetFlipMode(IFWL_Widget* pWidget) override;
-  FWL_Error GetMatrix(IFWL_Widget* pWidget, CFX_Matrix& matrix) override;
 
  private:
   CFX_DIBitmap* m_pBitmap;