Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/theme/cfwl_scrollbartp.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/theme/cfwl_scrollbartp.h"
 
 #include "xfa/fwl/basewidget/ifwl_scrollbar.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
 #include "xfa/fwl/core/ifwl_themeprovider.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 #include "xfa/fxgraphics/cfx_color.h"
 #include "xfa/fxgraphics/cfx_path.h"
 
 namespace {
 
 const float kPawLength = 12.5f;
 
 }  // namespace
 
 CFWL_ScrollBarTP::CFWL_ScrollBarTP() : m_pThemeData(new SBThemeData) {
   SetThemeData(0);
 }
 
 CFWL_ScrollBarTP::~CFWL_ScrollBarTP() {
   delete m_pThemeData;
 }
 
-FX_BOOL CFWL_ScrollBarTP::IsValidWidget(IFWL_Widget* pWidget) {
-  if (!pWidget)
-    return FALSE;
-  return pWidget->GetClassID() == FWL_CLASSHASH_ScrollBar;
+bool CFWL_ScrollBarTP::IsValidWidget(IFWL_Widget* pWidget) {
+  return pWidget && pWidget->GetClassID() == FWL_Type::ScrollBar;
 }
 void* CFWL_ScrollBarTP::GetCapacity(CFWL_ThemePart* pThemePart,
                                     CFWL_WidgetCapacity dwCapacity) {
   if (dwCapacity == CFWL_WidgetCapacity::Size) {
     m_fValue = 5;
     return &m_fValue;
   }
   return CFWL_WidgetTP::GetCapacity(pThemePart, dwCapacity);
 }
 uint32_t CFWL_ScrollBarTP::SetThemeID(IFWL_Widget* pWidget,
@@ skipping 262 matching lines @@
     m_pThemeData->clrBtnBorder[1] = ArgbEncode(0xff, 218, 230, 254);
     m_pThemeData->clrPawColorLight[2] = ArgbEncode(0xff, 207, 221, 253);
     m_pThemeData->clrPawColorDark[2] = ArgbEncode(0xff, 131, 158, 216);
     m_pThemeData->clrBtnBK[2][0] = ArgbEncode(0xff, 167, 190, 245);
     m_pThemeData->clrBtnBK[2][1] = ArgbEncode(0xff, 146, 179, 249);
     m_pThemeData->clrBtnBorder[2] = ArgbEncode(0xff, 124, 159, 211);
     m_pThemeData->clrTrackBKStart = ArgbEncode(0xff, 243, 241, 236);
     m_pThemeData->clrTrackBKEnd = ArgbEncode(0xff, 254, 254, 251);
   }
 }