Cleanup unneeded FWL theme code.

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"
@@ skipping 19 matching lines @@
 }
 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,
-                                      uint32_t dwThemeID,
-                                      FX_BOOL bChildren) {
+                                      uint32_t dwThemeID) {
   if (m_pThemeData)
     SetThemeData(FWL_GetThemeColor(dwThemeID));
-  return CFWL_WidgetTP::SetThemeID(pWidget, dwThemeID, bChildren);
+  return CFWL_WidgetTP::SetThemeID(pWidget, dwThemeID);
 }
 FX_BOOL CFWL_ScrollBarTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   if (!pParams)
     return FALSE;
   IFWL_Widget* pWidget = pParams->m_pWidget;
   FWLTHEME_STATE eState = FWLTHEME_STATE_Normal;
   if (pParams->m_dwStates & CFWL_PartState_Hovered)
     eState = FWLTHEME_STATE_Hover;
   else if (pParams->m_dwStates & CFWL_PartState_Pressed)
     eState = FWLTHEME_STATE_Pressed;
@@ skipping 238 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);
   }
 }