Merge to XFA: Switch from nonstd::unique_ptr to std::unique_ptr.

core/src/fxcodec/codec/fx_codec.cpp

Index: core/src/fxcodec/codec/fx_codec.cpp
diff --git a/core/src/fxcodec/codec/fx_codec.cpp b/core/src/fxcodec/codec/fx_codec.cpp
index f856f439584d4547f3a64aaaaed278891bf72a83..82a6ae67da6608005ac2df26dbe03806b1407bff 100644
--- a/core/src/fxcodec/codec/fx_codec.cpp
+++ b/core/src/fxcodec/codec/fx_codec.cpp
@@ -141,7 +141,7 @@ void CCodec_ScanlineDecoder::DownScale(int dest_width, int dest_height) {
     return;
   }
 
-  nonstd::unique_ptr<ImageDataCache> cache(
+  std::unique_ptr<ImageDataCache> cache(
       new ImageDataCache(m_OutputWidth, m_OutputHeight, m_Pitch));
   if (!cache->AllocateCache())
     return;