1 files changed, 10 insertions, 10 deletions

diff --git a/core/fpdfdoc/cpdf_occontext.cpp b/core/fpdfdoc/cpdf_occontext.cpp
index e59690996c..192a254329 100644
--- a/core/fpdfdoc/cpdf_occontext.cpp
+++ b/core/fpdfdoc/cpdf_occontext.cpp
@@ -150,9 +150,9 @@ bool CPDF_OCContext::LoadOCGState(const CPDF_Dictionary* pOCGDict) const {
     return true;
 
   ByteString csState = GetUsageTypeString(m_eUsageType);
-  CPDF_Dictionary* pUsage = pOCGDict->GetDictFor("Usage");
+  const CPDF_Dictionary* pUsage = pOCGDict->GetDictFor("Usage");
   if (pUsage) {
-    CPDF_Dictionary* pState = pUsage->GetDictFor(csState);
+    const CPDF_Dictionary* pState = pUsage->GetDictFor(csState);
     if (pState) {
       ByteString csFind = csState + "State";
       if (pState->KeyExist(csFind))
@@ -192,18 +192,18 @@ bool CPDF_OCContext::CheckObjectVisible(const CPDF_PageObject* pObj) {
   return true;
 }
 
-bool CPDF_OCContext::GetOCGVE(CPDF_Array* pExpression, int nLevel) {
+bool CPDF_OCContext::GetOCGVE(const CPDF_Array* pExpression, int nLevel) {
   if (nLevel > 32 || !pExpression)
     return false;
 
   ByteString csOperator = pExpression->GetStringAt(0);
   if (csOperator == "Not") {
-    CPDF_Object* pOCGObj = pExpression->GetDirectObjectAt(1);
+    const CPDF_Object* pOCGObj = pExpression->GetDirectObjectAt(1);
     if (!pOCGObj)
       return false;
-    if (CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
+    if (const CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
       return !GetOCGVisible(pDict);
-    if (CPDF_Array* pArray = pOCGObj->AsArray())
+    if (const CPDF_Array* pArray = pOCGObj->AsArray())
       return !GetOCGVE(pArray, nLevel + 1);
     return false;
   }
@@ -213,14 +213,14 @@ bool CPDF_OCContext::GetOCGVE(CPDF_Array* pExpression, int nLevel) {
 
   bool bValue = false;
   for (size_t i = 1; i < pExpression->GetCount(); i++) {
-    CPDF_Object* pOCGObj = pExpression->GetDirectObjectAt(1);
+    const CPDF_Object* pOCGObj = pExpression->GetDirectObjectAt(1);
     if (!pOCGObj)
       continue;
 
     bool bItem = false;
-    if (CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
+    if (const CPDF_Dictionary* pDict = pOCGObj->AsDictionary())
       bItem = GetOCGVisible(pDict);
-    else if (CPDF_Array* pArray = pOCGObj->AsArray())
+    else if (const CPDF_Array* pArray = pOCGObj->AsArray())
       bItem = GetOCGVE(pArray, nLevel + 1);
 
     if (i == 1) {
@@ -237,7 +237,7 @@ bool CPDF_OCContext::GetOCGVE(CPDF_Array* pExpression, int nLevel) {
 }
 
 bool CPDF_OCContext::LoadOCMDState(const CPDF_Dictionary* pOCMDDict) {
-  CPDF_Array* pVE = pOCMDDict->GetArrayFor("VE");
+  const CPDF_Array* pVE = pOCMDDict->GetArrayFor("VE");
   if (pVE)
     return GetOCGVE(pVE, 0);