Clean up CPDF_Page.

core/fpdfapi/fpdf_page/cpdf_colorstate.cpp

Index: core/fpdfapi/fpdf_page/cpdf_colorstate.cpp
diff --git a/core/fpdfapi/fpdf_page/cpdf_colorstate.cpp b/core/fpdfapi/fpdf_page/cpdf_colorstate.cpp
index 580b58a06a2498d517ea28b35a1b9410a1c5de12..88e9f561c32f7b2734d0bcb6b1a6be824172e764 100644
--- a/core/fpdfapi/fpdf_page/cpdf_colorstate.cpp
+++ b/core/fpdfapi/fpdf_page/cpdf_colorstate.cpp
@@ -49,10 +49,11 @@ void CPDF_ColorState::SetFillPattern(CPDF_Pattern* pPattern,
   pData->m_FillColor.SetValue(pPattern, pValue, nValues);
   int R, G, B;
   FX_BOOL ret = pData->m_FillColor.GetRGB(R, G, B);
-  if (pPattern->m_PatternType == 1 &&
-      ((CPDF_TilingPattern*)pPattern)->m_bColored && !ret) {
-    pData->m_FillRGB = 0x00BFBFBF;
-    return;
+  if (CPDF_TilingPattern* pTilingPattern = pPattern->AsTilingPattern()) {
+    if (!ret && pTilingPattern->colored()) {
+      pData->m_FillRGB = 0x00BFBFBF;
+      return;
+    }
   }
   pData->m_FillRGB = ret ? FXSYS_RGB(R, G, B) : (uint32_t)-1;
 }
@@ -64,10 +65,11 @@ void CPDF_ColorState::SetStrokePattern(CPDF_Pattern* pPattern,
   pData->m_StrokeColor.SetValue(pPattern, pValue, nValues);
   int R, G, B;
   FX_BOOL ret = pData->m_StrokeColor.GetRGB(R, G, B);
-  if (pPattern->m_PatternType == 1 &&
-      ((CPDF_TilingPattern*)pPattern)->m_bColored && !ret) {
-    pData->m_StrokeRGB = 0x00BFBFBF;
-    return;
+  if (CPDF_TilingPattern* pTilingPattern = pPattern->AsTilingPattern()) {
+    if (!ret && pTilingPattern->colored()) {
+      pData->m_StrokeRGB = 0x00BFBFBF;
+      return;
+    }
   }
   pData->m_StrokeRGB =
       pData->m_StrokeColor.GetRGB(R, G, B) ? FXSYS_RGB(R, G, B) : (uint32_t)-1;