Revert "Disable delegating constructors for 2.9"

It is only meant for the release branch.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127544 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Sema/SemaDeclCXX.cpp

@@ -1532,10 +1532,7 @@ Sema::BuildDelegatingInitializer(TypeSourceInfo *TInfo,
   if (!LangOpts.CPlusPlus0x)
     return Diag(Loc, diag::err_delegation_0x_only)
       << TInfo->getTypeLoc().getLocalSourceRange();
-  // Disable for 2.9.
-  return Diag(Loc, diag::err_delegation_unimplemented)
-    << TInfo->getTypeLoc().getLocalSourceRange();
-#if 0
+
   // Initialize the object.
   InitializedEntity DelegationEntity = InitializedEntity::InitializeDelegation(
                                      QualType(ClassDecl->getTypeForDecl(), 0));
@@ -1582,7 +1579,6 @@ Sema::BuildDelegatingInitializer(TypeSourceInfo *TInfo,
   return new (Context) CXXCtorInitializer(Context, Loc, LParenLoc, Constructor,
                                           DelegationInit.takeAs<Expr>(),
                                           RParenLoc);
-#endif
 }
 
 MemInitResult