Clean up CPDF_Color and some related code.

core/fpdfapi/fpdf_render/fpdf_render_pattern.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 "core/fpdfapi/fpdf_render/render_int.h"
 
 #include "core/fpdfapi/fpdf_page/cpdf_graphicstates.h"
 #include "core/fpdfapi/fpdf_page/cpdf_meshstream.h"
@@ skipping 1193 matching lines @@
   else if (CPDF_ShadingPattern* pShadingPattern = pattern->AsShadingPattern())
     DrawShadingPattern(pShadingPattern, pPathObj, pObj2Device, bStroke);
 }
 
 void CPDF_RenderStatus::ProcessPathPattern(const CPDF_PathObject* pPathObj,
                                            const CFX_Matrix* pObj2Device,
                                            int& filltype,
                                            FX_BOOL& bStroke) {
   if (filltype) {
     CPDF_Color& FillColor = *pPathObj->m_ColorState.GetFillColor();
-    if (FillColor.m_pCS && FillColor.m_pCS->GetFamily() == PDFCS_PATTERN) {
+    if (FillColor.IsPattern()) {
       DrawPathWithPattern(pPathObj, pObj2Device, &FillColor, FALSE);
       filltype = 0;
     }
   }
   if (bStroke) {
     CPDF_Color& StrokeColor = *pPathObj->m_ColorState.GetStrokeColor();
-    if (StrokeColor.m_pCS && StrokeColor.m_pCS->GetFamily() == PDFCS_PATTERN) {
+    if (StrokeColor.IsPattern()) {
       DrawPathWithPattern(pPathObj, pObj2Device, &StrokeColor, TRUE);
       bStroke = FALSE;
     }
   }
 }