Use sys::Path::eraseFromDisk instead of unlink as suggested by Chris.

llvm-svn: 84415
diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
index 7ee6648..084fa4d 100644
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -21,13 +21,14 @@
 #include "clang/Basic/TargetInfo.h"
 #include "clang/Basic/Diagnostic.h"
 #include "llvm/Support/Compiler.h"
+#include "llvm/System/Path.h"
 
 using namespace clang;
 
 ASTUnit::ASTUnit(Diagnostic &_Diags) : Diags(_Diags), tempFile(false) { }
 ASTUnit::~ASTUnit() { 
   if (tempFile)
-    unlink(getPCHFileName().c_str());
+    llvm::sys::Path(getPCHFileName()).eraseFromDisk();
 }
 
 namespace {