Convert the remaining statement parsers to smart pointers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@60895 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseStmt.cpp b/lib/Parse/ParseStmt.cpp
index ff9f6e3..35306a1 100644
--- a/lib/Parse/ParseStmt.cpp
+++ b/lib/Parse/ParseStmt.cpp
@@ -86,7 +86,7 @@
   case tok::at: // May be a @try or @throw statement
     {
       AtLoc = ConsumeToken();  // consume @
-      return Owned(ParseObjCAtStatement(AtLoc));
+      return ParseObjCAtStatement(AtLoc);
     }
 
   case tok::identifier: