PR5218: Replace IdentifierInfo::getName with StringRef version, now that clients
are updated.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84447 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index c7e5752..d96f5fb 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -2924,6 +2924,7 @@
   S += llvm::utostr(N);
 }
 
+// FIXME: Use SmallString for accumulating string.
 void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S,
                                             bool ExpandPointedToStructures,
                                             bool ExpandStructures,