Make CPDF_Dictionary use unique pointers.

core/fpdfapi/parser/cpdf_string.cpp

Index: core/fpdfapi/parser/cpdf_string.cpp
diff --git a/core/fpdfapi/parser/cpdf_string.cpp b/core/fpdfapi/parser/cpdf_string.cpp
index fd4ff04ff747eec3e2de322db174de3cc9b09c2b..ffdda0457252d5215d92f42d9e7ec872e6e1d3c8 100644
--- a/core/fpdfapi/parser/cpdf_string.cpp
+++ b/core/fpdfapi/parser/cpdf_string.cpp
@@ -19,8 +19,11 @@ CPDF_String::CPDF_String(CFX_WeakPtr<CFX_ByteStringPool> pPool,
     m_String = pPool->Intern(m_String);
 }
 
-CPDF_String::CPDF_String(const CFX_WideString& str) : m_bHex(false) {
-  m_String = PDF_EncodeText(str);
+CPDF_String::CPDF_String(CFX_WeakPtr<CFX_ByteStringPool> pPool,
+                         const CFX_WideString& str)
+    : m_String(PDF_EncodeText(str)), m_bHex(false) {
+  if (pPool)
+    m_String = pPool->Intern(m_String);
 }
 
 CPDF_String::~CPDF_String() {}