Revert r190269 to fix dragonegg failures.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190271 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/IR/DIBuilder.cpp b/lib/IR/DIBuilder.cpp
index 962b3a9..c485cc1 100644
--- a/lib/IR/DIBuilder.cpp
+++ b/lib/IR/DIBuilder.cpp
@@ -410,7 +410,7 @@
 
 /// createMemberType - Create debugging information entry for a member.
 DIDerivedType DIBuilder::createMemberType(
-    DIScope Scope, StringRef Name, DIFile File, unsigned LineNumber,
+    DIDescriptor Scope, StringRef Name, DIFile File, unsigned LineNumber,
     uint64_t SizeInBits, uint64_t AlignInBits, uint64_t OffsetInBits,
     unsigned Flags, DIType Ty) {
   // TAG_member is encoded in DIDerivedType format.