Avoid the ptr.reset(new XXX()) anti-pattern

core/fxcodec/codec/fx_codec_jbig.cpp

Index: core/fxcodec/codec/fx_codec_jbig.cpp
diff --git a/core/fxcodec/codec/fx_codec_jbig.cpp b/core/fxcodec/codec/fx_codec_jbig.cpp
index 8d20894231e8ddabde77046df71f802ac4efa8f9..926541f07dce19289f5b0f6895de880e13d2c56c 100644
--- a/core/fxcodec/codec/fx_codec_jbig.cpp
+++ b/core/fxcodec/codec/fx_codec_jbig.cpp
@@ -14,6 +14,7 @@
 #include "core/fxcodec/jbig2/JBig2_Context.h"
 #include "core/fxcodec/jbig2/JBig2_Image.h"
 #include "core/fxcrt/fx_memory.h"
+#include "third_party/base/ptr_util.h"
 
 JBig2_DocumentContext::JBig2_DocumentContext() {}
 
@@ -22,7 +23,7 @@ JBig2_DocumentContext::~JBig2_DocumentContext() {}
 JBig2_DocumentContext* GetJBig2DocumentContext(
     std::unique_ptr<JBig2_DocumentContext>* pContextHolder) {
   if (!pContextHolder->get())
-    pContextHolder->reset(new JBig2_DocumentContext());
+    *pContextHolder = pdfium::MakeUnique<JBig2_DocumentContext>();
   return pContextHolder->get();
 }
 
@@ -62,9 +63,9 @@ FXCODEC_STATUS CCodec_Jbig2Module::StartDecode(
   pJbig2Context->m_dest_pitch = dest_pitch;
   pJbig2Context->m_pPause = pPause;
   FXSYS_memset(dest_buf, 0, height * dest_pitch);
-  pJbig2Context->m_pContext.reset(new CJBig2_Context(
+  pJbig2Context->m_pContext = pdfium::MakeUnique<CJBig2_Context>(
       global_stream, src_stream, pJBig2DocumentContext->GetSymbolDictCache(),
-      pPause, false));
+      pPause, false);
   if (!pJbig2Context->m_pContext)
     return FXCODEC_STATUS_ERROR;