[clangd] NFC, use const HeaderSearch when possible.

diff --git a/clang-tools-extra/clangd/index/SymbolCollector.cpp b/clang-tools-extra/clangd/index/SymbolCollector.cpp
index a2f8cd2..d1840ff 100644 (file)
--- a/clang-tools-extra/clangd/index/SymbolCollector.cpp
+++ b/clang-tools-extra/clangd/index/SymbolCollector.cpp
@@ -298,7 +298,7 @@ private:
   // importing the header.
   std::optional<std::string> getFrameworkUmbrellaSpelling(
       llvm::StringRef Framework, SrcMgr::CharacteristicKind HeadersDirKind,
-      HeaderSearch &HS, FrameworkHeaderPath &HeaderPath) {
+      const HeaderSearch &HS, FrameworkHeaderPath &HeaderPath) {
     auto Res = CacheFrameworkToUmbrellaHeaderSpelling.try_emplace(Framework);
     auto *CachedSpelling = &Res.first->second;
     if (!Res.second) {