Revert r155737, restoring the MaxDepth in the BalancedDelimiterTracker to 256.
r155737 turned out to be a temporary work around.  The correct fix was in r155823.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157627 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Parse/Parser.h b/include/clang/Parse/Parser.h
index f314376..07d6320 100644
--- a/include/clang/Parse/Parser.h
+++ b/include/clang/Parse/Parser.h
@@ -455,7 +455,7 @@
       }
     }
     
-    enum { MaxDepth = 512 };
+    enum { MaxDepth = 256 };
     
     bool diagnoseOverflow();
     bool diagnoseMissingClose();