Cleanup unused methods and return values in FWL code.

xfa/fwl/core/ifwl_scrollbar.cpp

 // 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
 
 #include "xfa/fwl/core/ifwl_scrollbar.h"
 
 #include "xfa/fwl/core/cfwl_message.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
@@ skipping 23 matching lines @@
       m_fLastTrackPos(0),
       m_cpTrackPointX(0),
       m_cpTrackPointY(0),
       m_iMouseWheel(0),
       m_bTrackMouseLeave(FALSE),
       m_bMouseHover(FALSE),
       m_bMouseDown(FALSE),
       m_bRepaintThumb(FALSE),
       m_fButtonLen(0),
       m_bMinSize(FALSE),
-      m_bCustomLayout(FALSE),
+      m_bCustomLayout(false),
       m_fMinThumb(FWL_SCROLLBAR_MinThumb) {
   m_rtClient.Reset();
   m_rtThumb.Reset();
   m_rtMinBtn.Reset();
   m_rtMaxBtn.Reset();
   m_rtMinTrack.Reset();
   m_rtMaxTrack.Reset();
 }
 
 IFWL_ScrollBar::~IFWL_ScrollBar() {}
 
-FWL_Error IFWL_ScrollBar::GetClassName(CFX_WideString& wsClass) const {
-  wsClass = FWL_CLASS_ScrollBar;
-  return FWL_Error::Succeeded;
-}
-
 FWL_Type IFWL_ScrollBar::GetClassID() const {
   return FWL_Type::ScrollBar;
 }
 
 FWL_Error IFWL_ScrollBar::Initialize() {
   if (IFWL_Widget::Initialize() != FWL_Error::Succeeded)
     return FWL_Error::Indefinite;
 
   m_pDelegate = new CFWL_ScrollBarImpDelegate(this);
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_ScrollBar::Finalize() {
+void IFWL_ScrollBar::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Widget::Finalize();
+  IFWL_Widget::Finalize();
 }
 
 FWL_Error IFWL_ScrollBar::GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize) {
   if (bAutoSize) {
     rect.Set(0, 0, 0, 0);
     FX_FLOAT* pfMinWidth = static_cast<FX_FLOAT*>(
         GetThemeCapacity(CFWL_WidgetCapacity::ScrollBarWidth));
     if (!pfMinWidth)
       return FWL_Error::Indefinite;
     if (IsVertical()) {
@@ skipping 685 matching lines @@
 
 void CFWL_ScrollBarImpDelegate::DoMouseHover(int32_t iItem,
                                              const CFX_RectF& rtItem,
                                              int32_t& iState) {
   if (iState == CFWL_PartState_Hovered) {
     return;
   }
   iState = CFWL_PartState_Hovered;
   m_pOwner->Repaint(&rtItem);
 }