[ASTImporter][NFC] Enable disabled but passing test

RedeclChainShouldBeCorrectAmongstNamespaces

llvm-svn: 373896
diff --git a/clang/unittests/AST/ASTImporterTest.cpp b/clang/unittests/AST/ASTImporterTest.cpp
index 1514313..ba2feff 100644
--- a/clang/unittests/AST/ASTImporterTest.cpp
+++ b/clang/unittests/AST/ASTImporterTest.cpp
@@ -4785,11 +4785,8 @@
   EXPECT_EQ(*Res.begin(), A);
 }
 
-
-// FIXME This test is disabled currently, upcoming patches will make it
-// possible to enable.
 TEST_P(ASTImporterOptionSpecificTestBase,
-       DISABLED_RedeclChainShouldBeCorrectAmongstNamespaces) {
+       RedeclChainShouldBeCorrectAmongstNamespaces) {
   Decl *FromTU = getTuDecl(
       R"(
       namespace NS {