Updated to Clang 3.5a.

Change-Id: I8127eb568f674c2e72635b639a3295381fe8af82
diff --git a/lib/Rewrite/Frontend/RewriteMacros.cpp b/lib/Rewrite/Frontend/RewriteMacros.cpp
index 4f6a93f..0d0a991 100644
--- a/lib/Rewrite/Frontend/RewriteMacros.cpp
+++ b/lib/Rewrite/Frontend/RewriteMacros.cpp
@@ -16,10 +16,10 @@
 #include "clang/Basic/SourceManager.h"
 #include "clang/Lex/Preprocessor.h"
 #include "clang/Rewrite/Core/Rewriter.h"
-#include "llvm/ADT/OwningPtr.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/raw_ostream.h"
 #include <cstdio>
+#include <memory>
 
 using namespace clang;