Replace some instances of std::string with StringRefs.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@81079 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/FileManager.cpp b/lib/Basic/FileManager.cpp
index afc9284..aadafa5 100644
--- a/lib/Basic/FileManager.cpp
+++ b/lib/Basic/FileManager.cpp
@@ -22,6 +22,9 @@
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Path.h"
#include "llvm/Config/config.h"
+#include <map>
+#include <set>
+#include <string>
using namespace clang;
// FIXME: Enhance libsystem to support inode and other fields.