Support decltype in nested-name-specifiers.

llvm-svn: 145785
diff --git a/clang/lib/Parse/ParseExpr.cpp b/clang/lib/Parse/ParseExpr.cpp
index 75fc9be..dcbee4f 100644
--- a/clang/lib/Parse/ParseExpr.cpp
+++ b/clang/lib/Parse/ParseExpr.cpp
@@ -664,6 +664,7 @@
     ConsumeToken();
     break;
       
+  case tok::kw_decltype:
   case tok::identifier: {      // primary-expression: identifier
                                // unqualified-id: identifier
                                // constant: enumeration-constant