Add a missing case

llvm-svn: 112065
diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
index fe460bb..31e42a3 100644
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -1552,6 +1552,7 @@
   case CodeCompletionContext::CCC_MacroName:
   case CodeCompletionContext::CCC_MacroNameUse:
   case CodeCompletionContext::CCC_PreprocessorExpression:
+  case CodeCompletionContext::CCC_NaturalLanguage:
     // If we're just looking for protocol or macro names, nothing can hide them.
     return;
   }