This only needs a StringRef.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212401 91177308-0d34-0410-b5e6-96231b3b80d8
This only needs a StringRef.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212402 91177308-0d34-0410-b5e6-96231b3b80d8
Declare variable on first use.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212403 91177308-0d34-0410-b5e6-96231b3b80d8