[clang][lex] NFCI: Use FileEntryRef in Sema::CodeCompleteIncludedFile

[jansvoboda11]

Summary

This patch replaces some calls to the deprecated DirectoryEntry::getName() with calls to DirectoryEntryRef::getName() in SemaCodeComplete.cpp.

Depends on D127654.

clang/lib/Sema/SemaCodeComplete.cpp

void Sema::CodeCompleteIncludedFile(llvm::StringRef Dir, bool Angled) {
   // Helper: adds results relative to IncludeDir, if possible.
   auto AddFilesFromDirLookup = [&](const DirectoryLookup &IncludeDir,
                                    bool IsSystem) {
     switch (IncludeDir.getLookupType()) {
     case DirectoryLookup::LT_HeaderMap:
       // header maps are not (currently) enumerable.
       break;
     case DirectoryLookup::LT_NormalDir:
-      AddFilesFromIncludeDir(IncludeDir.getDir()->getName(), IsSystem,
+      AddFilesFromIncludeDir(IncludeDir.getDirRef()->getName(), IsSystem,
                              DirectoryLookup::LT_NormalDir);
       break;
     case DirectoryLookup::LT_Framework:
-      AddFilesFromIncludeDir(IncludeDir.getFrameworkDir()->getName(), IsSystem,
-                             DirectoryLookup::LT_Framework);
+      AddFilesFromIncludeDir(IncludeDir.getFrameworkDirRef()->getName(),
+                             IsSystem, DirectoryLookup::LT_Framework);
       break;
     }
   };
 
   // Finally with all our helpers, we can scan the include path.
   // Do this in standard order so deduplication keeps the right file.
   // (In case we decide to add more details to the results later).
   const auto &S = PP.getHeaderSearchInfo();
   using llvm::make_range;
   if (!Angled) {
     // The current directory is on the include path for "quoted" includes.
-    const FileEntry *CurFile = PP.getCurrentFileLexer()->getFileEntry();
-    if (CurFile && CurFile->getDir())
-      AddFilesFromIncludeDir(CurFile->getDir()->getName(), false,
+    if (auto CurFile = PP.getCurrentFileLexer()->getFileEntry())
+      AddFilesFromIncludeDir(CurFile->getDir().getName(), false,
                              DirectoryLookup::LT_NormalDir);
     for (const auto &D : make_range(S.quoted_dir_begin(), S.quoted_dir_end()))
       AddFilesFromDirLookup(D, false);
   }
   for (const auto &D : make_range(S.angled_dir_begin(), S.angled_dir_end()))
     AddFilesFromDirLookup(D, false);
   for (const auto &D : make_range(S.system_dir_begin(), S.system_dir_end()))
     AddFilesFromDirLookup(D, true);