Add proper const/non-const versions of CPDF_Dictionary::GetDictFor().

BUG=pdfium:234

Change-Id: I6fde00c976ad4bb9cab632f465cf292f5b1da3d2
Reviewed-on: https://pdfium-review.googlesource.com/32914
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/core/fpdfapi/parser/cpdf_security_handler.cpp b/core/fpdfapi/parser/cpdf_security_handler.cpp
index 7eb5c42f72..eeba53ef34 100644
--- a/core/fpdfapi/parser/cpdf_security_handler.cpp
+++ b/core/fpdfapi/parser/cpdf_security_handler.cpp
@@ -130,17 +130,17 @@ static bool LoadCryptInfo(const CPDF_Dictionary* pEncryptDict,
   cipher = FXCIPHER_RC4;
   keylen = 0;
   if (Version >= 4) {
-    CPDF_Dictionary* pCryptFilters = pEncryptDict->GetDictFor("CF");
-    if (!pCryptFilters) {
+    const CPDF_Dictionary* pCryptFilters = pEncryptDict->GetDictFor("CF");
+    if (!pCryptFilters)
       return false;
-    }
+
     if (name == "Identity") {
       cipher = FXCIPHER_NONE;
     } else {
-      CPDF_Dictionary* pDefFilter = pCryptFilters->GetDictFor(name);
-      if (!pDefFilter) {
+      const CPDF_Dictionary* pDefFilter = pCryptFilters->GetDictFor(name);
+      if (!pDefFilter)
         return false;
-      }
+
       int nKeyBits = 0;
       if (Version == 4) {
         nKeyBits = pDefFilter->GetIntegerFor("Length", 0);