2 files changed, 15 insertions, 9 deletions
diff --git a/core/fpdfdoc/doc_basic.cpp b/core/fpdfdoc/doc_basic.cpp
index a3e94cb033..a0c6b2babc 100644
--- a/core/fpdfdoc/doc_basic.cpp
+++ b/core/fpdfdoc/doc_basic.cpp
@@ -71,12 +71,19 @@ FX_FLOAT CPDF_Dest::GetParam(int index) {
 CFX_ByteString CPDF_Dest::GetRemoteName() {
   return m_pObj ? m_pObj->GetString() : CFX_ByteString();
 }
+
 CPDF_NameTree::CPDF_NameTree(CPDF_Document* pDoc,
-                             const CFX_ByteStringC& category) {
-  if (pDoc->GetRoot() && pDoc->GetRoot()->GetDictBy("Names"))
-    m_pRoot = pDoc->GetRoot()->GetDictBy("Names")->GetDictBy(category);
-  else
-    m_pRoot = NULL;
+                             const CFX_ByteString& category)
+    : m_pRoot(nullptr) {
+  CPDF_Dictionary* pRoot = pDoc->GetRoot();
+  if (!pRoot)
+    return;
+
+  CPDF_Dictionary* pNames = pRoot->GetDictBy("Names");
+  if (!pNames)
+    return;
+
+  m_pRoot = pNames->GetDictBy(category);
 }
 
 static CPDF_Object* SearchNameNode(CPDF_Dictionary* pNode,
@@ -233,7 +240,7 @@ CPDF_Object* CPDF_NameTree::LookupValue(const CFX_ByteString& csName) const {
   return SearchNameNode(m_pRoot, csName, nIndex, NULL);
 }
 CPDF_Array* CPDF_NameTree::LookupNamedDest(CPDF_Document* pDoc,
-                                           const CFX_ByteStringC& sName) {
+                                           const CFX_ByteString& sName) {
   CPDF_Object* pValue = LookupValue(sName);
   if (!pValue) {
     CPDF_Dictionary* pDests = pDoc->GetRoot()->GetDictBy("Dests");
diff --git a/core/fpdfdoc/include/fpdf_doc.h b/core/fpdfdoc/include/fpdf_doc.h
index b8bc56b0cc..c11bf43c4e 100644
--- a/core/fpdfdoc/include/fpdf_doc.h
+++ b/core/fpdfdoc/include/fpdf_doc.h
@@ -51,12 +51,11 @@ class CFX_RenderDevice;
 class CPDF_NameTree {
  public:
   explicit CPDF_NameTree(CPDF_Dictionary* pRoot) : m_pRoot(pRoot) {}
-  CPDF_NameTree(CPDF_Document* pDoc, const CFX_ByteStringC& category);
+  CPDF_NameTree(CPDF_Document* pDoc, const CFX_ByteString& category);
 
   CPDF_Object* LookupValue(int nIndex, CFX_ByteString& csName) const;
   CPDF_Object* LookupValue(const CFX_ByteString& csName) const;
-  CPDF_Array* LookupNamedDest(CPDF_Document* pDoc,
-                              const CFX_ByteStringC& sName);
+  CPDF_Array* LookupNamedDest(CPDF_Document* pDoc, const CFX_ByteString& sName);
   int GetIndex(const CFX_ByteString& csName) const;
   size_t GetCount() const;
   CPDF_Dictionary* GetRoot() const { return m_pRoot; }