Make CPDF_Stream() take unique_ptr's to its dictionary.

xfa/fxfa/app/xfa_ffapp_unittest.cpp

Index: xfa/fxfa/app/xfa_ffapp_unittest.cpp
diff --git a/xfa/fxfa/app/xfa_ffapp_unittest.cpp b/xfa/fxfa/app/xfa_ffapp_unittest.cpp
index 10c0545fbbd55d7c03457dd96ea252ef6df1f811..b35780d218e40b4a549e3ca2ab90dcce257c0858 100644
--- a/xfa/fxfa/app/xfa_ffapp_unittest.cpp
+++ b/xfa/fxfa/app/xfa_ffapp_unittest.cpp
@@ -46,11 +46,11 @@ TEST(CXFAFileRead, NormalStreams) {
 
   // 16 chars total.
   stream1->InitStream(reinterpret_cast<const uint8_t*>("one t"), 5,
-                      new CPDF_Dictionary());
+                      pdfium::MakeUnique<CPDF_Dictionary>());
   stream2->InitStream(reinterpret_cast<const uint8_t*>("wo "), 3,
-                      new CPDF_Dictionary());
+                      pdfium::MakeUnique<CPDF_Dictionary>());
   stream3->InitStream(reinterpret_cast<const uint8_t*>("three!!!"), 8,
-                      new CPDF_Dictionary());
+                      pdfium::MakeUnique<CPDF_Dictionary>());
 
   streams.push_back(stream1.get());
   streams.push_back(stream2.get());