Remove decltype in an attempt to fix the MSVC build.
Remove decltype in an attempt to fix the MSVC build.

C++ is hard, attempt #1 of n.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@227768 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang