diff --git a/llvm/lib/Support/VirtualFileSystem.cpp b/llvm/lib/Support/VirtualFileSystem.cpp
index 23b5fbc..cf7fe96 100644
--- a/llvm/lib/Support/VirtualFileSystem.cpp
+++ b/llvm/lib/Support/VirtualFileSystem.cpp
@@ -1028,7 +1028,6 @@
 ///   'case-sensitive': <boolean, default=true>
 ///   'use-external-names': <boolean, default=true>
 ///   'overlay-relative': <boolean, default=false>
-///   'ignore-non-existent-contents': <boolean, default=true>
 ///
 /// Virtual directories are represented as
 /// \verbatim
@@ -1092,14 +1091,6 @@
   /// Whether to use to use the value of 'external-contents' for the
   /// names of files.  This global value is overridable on a per-file basis.
   bool UseExternalNames = true;
-
-  /// Whether an invalid path obtained via 'external-contents' should
-  /// cause iteration on the VFS to stop. If 'true', the VFS should ignore
-  /// the entry and continue with the next. Allows YAML files to be shared
-  /// across multiple compiler invocations regardless of prior existent
-  /// paths in 'external-contents'. This global value is overridable on a
-  /// per-file basis.
-  bool IgnoreNonExistentContents = true;
   /// @}
 
   /// Virtual file paths and external files could be canonicalized without "..",
@@ -1176,8 +1167,6 @@
     return ExternalContentsPrefixDir;
   }
 
-  bool ignoreNonExistentContents() const { return IgnoreNonExistentContents; }
-
 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
   LLVM_DUMP_METHOD void dump() const {
     for (const auto &Root : Roots)
@@ -1549,7 +1538,6 @@
         KeyStatusPair("case-sensitive", false),
         KeyStatusPair("use-external-names", false),
         KeyStatusPair("overlay-relative", false),
-        KeyStatusPair("ignore-non-existent-contents", false),
         KeyStatusPair("roots", true),
     };
 
@@ -1607,9 +1595,6 @@
       } else if (Key == "use-external-names") {
         if (!parseScalarBool(I.getValue(), FS->UseExternalNames))
           return false;
-      } else if (Key == "ignore-non-existent-contents") {
-        if (!parseScalarBool(I.getValue(), FS->IgnoreNonExistentContents))
-          return false;
       } else {
         llvm_unreachable("key missing from Keys");
       }
@@ -1915,7 +1900,7 @@
 
   void write(ArrayRef<YAMLVFSEntry> Entries, Optional<bool> UseExternalNames,
              Optional<bool> IsCaseSensitive, Optional<bool> IsOverlayRelative,
-             Optional<bool> IgnoreNonExistentContents, StringRef OverlayDir);
+             StringRef OverlayDir);
 };
 
 } // namespace
@@ -1973,7 +1958,6 @@
                        Optional<bool> UseExternalNames,
                        Optional<bool> IsCaseSensitive,
                        Optional<bool> IsOverlayRelative,
-                       Optional<bool> IgnoreNonExistentContents,
                        StringRef OverlayDir) {
   using namespace llvm::sys;
 
@@ -1991,9 +1975,6 @@
     OS << "  'overlay-relative': '" << (UseOverlayRelative ? "true" : "false")
        << "',\n";
   }
-  if (IgnoreNonExistentContents.hasValue())
-    OS << "  'ignore-non-existent-contents': '"
-       << (IgnoreNonExistentContents.getValue() ? "true" : "false") << "',\n";
   OS << "  'roots': [\n";
 
   if (!Entries.empty()) {
@@ -2049,8 +2030,7 @@
   });
 
   JSONWriter(OS).write(Mappings, UseExternalNames, IsCaseSensitive,
-                       IsOverlayRelative, IgnoreNonExistentContents,
-                       OverlayDir);
+                       IsOverlayRelative, OverlayDir);
 }
 
 VFSFromYamlDirIterImpl::VFSFromYamlDirIterImpl(