Remove an implemented FIXME and extend test cases. Follow-up on Doug's review.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63032 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index d62e767..719938d 100644
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -642,15 +642,14 @@
   return T;
 }
 
-/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types (FIXME:
-/// or pointer-to-member types) that may be similar (C++ 4.4),
-/// replaces T1 and T2 with the type that they point to and return
-/// true. If T1 and T2 aren't pointer types or pointer-to-member
-/// types, or if they are not similar at this level, returns false and
-/// leaves T1 and T2 unchanged. Top-level qualifiers on T1 and T2 are
-/// ignored. This function will typically be called in a loop that
-/// successively "unwraps" pointer and pointer-to-member types to
-/// compare them at each level.
+/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types  that
+/// may be similar (C++ 4.4), replaces T1 and T2 with the type that
+/// they point to and return true. If T1 and T2 aren't pointer types
+/// or pointer-to-member types, or if they are not similar at this
+/// level, returns false and leaves T1 and T2 unchanged. Top-level
+/// qualifiers on T1 and T2 are ignored. This function will typically
+/// be called in a loop that successively "unwraps" pointer and
+/// pointer-to-member types to compare them at each level.
 bool Sema::UnwrapSimilarPointerTypes(QualType& T1, QualType& T2)
 {
   const PointerType *T1PtrType = T1->getAsPointerType(),