Cleanup unused methods and return values in FWL code.

xfa/fwl/core/ifwl_form.h

Index: xfa/fwl/core/ifwl_form.h
diff --git a/xfa/fwl/core/ifwl_form.h b/xfa/fwl/core/ifwl_form.h
index 9bb2904c30de1e90baafcb56885a5d13bac87130..f0c261ab093315c72c016731f529157dd1f00bdb 100644
--- a/xfa/fwl/core/ifwl_form.h
+++ b/xfa/fwl/core/ifwl_form.h
@@ -89,11 +89,10 @@ class IFWL_Form : public IFWL_Widget {
   ~IFWL_Form() override;
 
   // IFWL_Widget
-  FWL_Error GetClassName(CFX_WideString& wsClass) const override;
   FWL_Type GetClassID() const override;
   FX_BOOL IsInstance(const CFX_WideStringC& wsClass) const override;
   FWL_Error Initialize() override;
-  FWL_Error Finalize() override;
+  void Finalize() override;
 
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_Error GetClientRect(CFX_RectF& rect) override;
@@ -174,7 +173,7 @@ class IFWL_Form : public IFWL_Widget {
   FX_BOOL m_bLButtonDown;
   bool m_bMaximized;
   FX_BOOL m_bSetMaximize;
-  FX_BOOL m_bCustomizeLayout;
+  bool m_bCustomizeLayout;
   FWL_FORMSIZE m_eFormSize;
   FX_BOOL m_bDoModalFlag;
   FX_FLOAT m_fSmallIconSz;