Remove CLASSHASH defines in favour of an enum class.

xfa/fwl/lightwidget/cfwl_theme.h

 // 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
 
 #ifndef XFA_FWL_LIGHTWIDGET_CFWL_THEME_H_
 #define XFA_FWL_LIGHTWIDGET_CFWL_THEME_H_
 
 #include <memory>
 #include <vector>
 
 #include "core/fxcrt/include/fx_coordinates.h"
 #include "core/fxcrt/include/fx_system.h"
 #include "core/fxge/include/fx_dib.h"
 #include "xfa/fwl/core/ifwl_themeprovider.h"
 
 class CFWL_WidgetTP;
 class IFWL_Widget;
 class CFWL_ThemePart;
 class CFWL_ThemeText;
 
 class CFWL_Theme : public IFWL_ThemeProvider {
  public:
   CFWL_Theme();
   ~CFWL_Theme() override;
 
   // IFWL_ThemeProvider:
-  FX_BOOL IsValidWidget(IFWL_Widget* pWidget) override;
+  bool IsValidWidget(IFWL_Widget* pWidget) override;
   uint32_t GetThemeID(IFWL_Widget* pWidget) override;
   uint32_t SetThemeID(IFWL_Widget* pWidget,
                       uint32_t dwThemeID,
                       FX_BOOL bChildren = TRUE) override;
   FWL_Error GetThemeMatrix(IFWL_Widget* pWidget, CFX_Matrix& matrix) override;
   FWL_Error SetThemeMatrix(IFWL_Widget* pWidget,
                            const CFX_Matrix& matrix) override;
   FX_BOOL DrawBackground(CFWL_ThemeBackground* pParams) override;
   FX_BOOL DrawText(CFWL_ThemeText* pParams) override;
   void* GetCapacity(CFWL_ThemePart* pThemePart,
@@ skipping 11 matching lines @@
                     const FX_WCHAR* strFont,
                     FX_FLOAT fFontSize,
                     FX_ARGB rgbFont);
   CFWL_WidgetTP* GetTheme(IFWL_Widget* pWidget);
 
  protected:
   std::vector<std::unique_ptr<CFWL_WidgetTP>> m_ThemesArray;
 };
 
 #endif  // XFA_FWL_LIGHTWIDGET_CFWL_THEME_H_