gn build: Merge r374982

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@374983 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/gn/secondary/clang-tools-extra/clangd/refactor/tweaks/BUILD.gn b/utils/gn/secondary/clang-tools-extra/clangd/refactor/tweaks/BUILD.gn
index eb7cc23..313803d 100644
--- a/utils/gn/secondary/clang-tools-extra/clangd/refactor/tweaks/BUILD.gn
+++ b/utils/gn/secondary/clang-tools-extra/clangd/refactor/tweaks/BUILD.gn
@@ -19,6 +19,7 @@
     "ExtractFunction.cpp",
     "ExtractVariable.cpp",
     "RawStringLiteral.cpp",
+    "RemoveUsingNamespace.cpp",
     "SwapIfBranches.cpp",
   ]
 }