Undo accidental disabling of smart pointers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62937 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Parse/Ownership.h b/include/clang/Parse/Ownership.h
index 14c4bbf..2144481 100644
--- a/include/clang/Parse/Ownership.h
+++ b/include/clang/Parse/Ownership.h
@@ -103,7 +103,7 @@
 // conversions.
 
 // Flip this switch to measure performance impact of the smart pointers.
-#define DISABLE_SMART_POINTERS
+//#define DISABLE_SMART_POINTERS
 
 namespace clang
 {