Cleanup unused methods and return values in FWL code.

xfa/fwl/theme/cfwl_carettp.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_carettp.h"
 
 #include "xfa/fwl/core/cfwl_themebackground.h"
 #include "xfa/fwl/core/ifwl_caret.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 #include "xfa/fxgraphics/cfx_color.h"
 #include "xfa/fxgraphics/cfx_path.h"
 
 CFWL_CaretTP::CFWL_CaretTP() {}
 CFWL_CaretTP::~CFWL_CaretTP() {}
 
 bool CFWL_CaretTP::IsValidWidget(IFWL_Widget* pWidget) {
   return pWidget && pWidget->GetClassID() == FWL_Type::Caret;
 }
 
-FX_BOOL CFWL_CaretTP::DrawBackground(CFWL_ThemeBackground* pParams) {
+void CFWL_CaretTP::DrawBackground(CFWL_ThemeBackground* pParams) {
   if (!pParams)
-    return FALSE;
+    return;
+
   switch (pParams->m_iPart) {
     case CFWL_Part::Background: {
-      if (!(pParams->m_dwStates & CFWL_PartState_HightLight)) {
-        return TRUE;
-      }
+      if (!(pParams->m_dwStates & CFWL_PartState_HightLight))
+        return;
+
       DrawCaretBK(pParams->m_pGraphics, pParams->m_dwStates,
                   &(pParams->m_rtPart), (CFX_Color*)pParams->m_pData,
                   &(pParams->m_matrix));
       break;
     }
     default:
       break;
   }
-  return TRUE;
 }
+
 void CFWL_CaretTP::DrawCaretBK(CFX_Graphics* pGraphics,
                                uint32_t dwStates,
                                const CFX_RectF* pRect,
                                CFX_Color* crFill,
                                CFX_Matrix* pMatrix) {
   CFX_Path path;
   path.Create();
   CFX_RectF rect = *pRect;
   path.AddRectangle(rect.left, rect.top, rect.width, rect.height);
   if (crFill) {
     pGraphics->SetFillColor(crFill);
   } else {
     CFX_Color crFilltemp(ArgbEncode(255, 0, 0, 0));
     pGraphics->SetFillColor(&crFilltemp);
   }
   pGraphics->FillPath(&path, FXFILL_WINDING, pMatrix);
 }