diff --git a/xfa/fgas/BUILD.gn b/xfa/fgas/BUILD.gn
index 17e60cd..7860fbd 100644
--- a/xfa/fgas/BUILD.gn
+++ b/xfa/fgas/BUILD.gn
@@ -38,13 +38,6 @@
     "../:xfa_warnings",
   ]
   visibility = [ "../../*" ]
-
-  if (!is_win) {
-    sources += [
-      "font/cfgas_fontsource_enum_file.cpp",
-      "font/cfgas_fontsource_enum_file.h",
-    ]
-  }
 }
 
 pdfium_unittest_source_set("unittests") {
diff --git a/xfa/fgas/font/cfgas_fontmgr.cpp b/xfa/fgas/font/cfgas_fontmgr.cpp
index 485c1dd..8b2de13 100644
--- a/xfa/fgas/font/cfgas_fontmgr.cpp
+++ b/xfa/fgas/font/cfgas_fontmgr.cpp
@@ -23,10 +23,6 @@
 #include "xfa/fgas/font/cfgas_gefont.h"
 #include "xfa/fgas/font/fgas_fontutils.h"
 
-#if !defined(OS_WIN)
-#include "xfa/fgas/font/cfgas_fontsource_enum_file.h"
-#endif
-
 namespace {
 
 bool VerifyUnicode(const RetainPtr<CFGAS_GEFont>& pFont, wchar_t wcUnicode) {
@@ -608,8 +604,7 @@
 
 CFX_FontDescriptor::~CFX_FontDescriptor() = default;
 
-CFGAS_FontMgr::CFGAS_FontMgr()
-    : m_pFontSource(std::make_unique<CFGAS_FontSourceEnumFile>()) {}
+CFGAS_FontMgr::CFGAS_FontMgr() = default;
 
 CFGAS_FontMgr::~CFGAS_FontMgr() = default;
 
@@ -632,19 +627,8 @@
   return !m_InstalledFonts.empty();
 }
 
-bool CFGAS_FontMgr::EnumFontsFromFiles() {
-  m_pFontSource->GetNext();
-  while (m_pFontSource->HasNext()) {
-    RetainPtr<IFX_SeekableStream> stream = m_pFontSource->GetStream();
-    if (stream)
-      RegisterFaces(stream, nullptr);
-    m_pFontSource->GetNext();
-  }
-  return !m_InstalledFonts.empty();
-}
-
 bool CFGAS_FontMgr::EnumFonts() {
-  return EnumFontsFromFontMapper() || EnumFontsFromFiles();
+  return EnumFontsFromFontMapper();
 }
 
 RetainPtr<CFGAS_GEFont> CFGAS_FontMgr::GetFontByUnicodeImpl(
diff --git a/xfa/fgas/font/cfgas_fontmgr.h b/xfa/fgas/font/cfgas_fontmgr.h
index 0d5daff..c91cc8c 100644
--- a/xfa/fgas/font/cfgas_fontmgr.h
+++ b/xfa/fgas/font/cfgas_fontmgr.h
@@ -21,7 +21,6 @@
 #include "core/fxge/cfx_face.h"
 #include "core/fxge/fx_freetype.h"
 
-class CFGAS_FontSourceEnumFile;
 class CFGAS_GEFont;
 class CFX_FontMapper;
 class IFX_SeekableReadStream;
@@ -149,7 +148,6 @@
 #if defined(OS_WIN)
   std::deque<FX_FONTDESCRIPTOR> m_FontFaces;
 #else
-  std::unique_ptr<CFGAS_FontSourceEnumFile> m_pFontSource;
   std::vector<std::unique_ptr<CFX_FontDescriptor>> m_InstalledFonts;
   std::map<uint32_t, std::unique_ptr<std::vector<CFX_FontDescriptorInfo>>>
       m_Hash2CandidateList;
diff --git a/xfa/fgas/font/cfgas_fontsource_enum_file.cpp b/xfa/fgas/font/cfgas_fontsource_enum_file.cpp
deleted file mode 100644
index eb57acf..0000000
--- a/xfa/fgas/font/cfgas_fontsource_enum_file.cpp
+++ /dev/null
@@ -1,97 +0,0 @@
-// Copyright 2018 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#include "xfa/fgas/font/cfgas_fontsource_enum_file.h"
-
-#include <iterator>
-
-#include "build/build_config.h"
-
-namespace {
-
-constexpr char kFolderSeparator = '/';
-
-constexpr const char* kFontFolders[] = {
-#if defined(OS_LINUX) || defined(OS_CHROMEOS)
-    "/usr/share/fonts",
-    "/usr/share/X11/fonts/Type1",
-    "/usr/share/X11/fonts/TTF",
-    "/usr/local/share/fonts",
-#elif defined(OS_APPLE)
-    "~/Library/Fonts",
-    "/Library/Fonts",
-    "/System/Library/Fonts",
-#elif defined(OS_ANDROID)
-    "/system/fonts",
-#endif
-};
-
-}  // namespace
-
-CFGAS_FontSourceEnumFile::CFGAS_FontSourceEnumFile()
-    : m_FolderPaths(std::begin(kFontFolders), std::end(kFontFolders)) {}
-
-CFGAS_FontSourceEnumFile::~CFGAS_FontSourceEnumFile() = default;
-
-ByteString CFGAS_FontSourceEnumFile::GetNextFile() {
-  FX_FolderHandle* pCurHandle =
-      !m_FolderQueue.empty() ? m_FolderQueue.back().pFolderHandle : nullptr;
-  if (!pCurHandle) {
-    if (m_FolderPaths.empty())
-      return ByteString();
-    pCurHandle = FX_OpenFolder(m_FolderPaths.back().c_str());
-    HandleParentPath hpp;
-    hpp.pFolderHandle = pCurHandle;
-    hpp.bsParentPath = m_FolderPaths.back();
-    m_FolderQueue.push_back(hpp);
-  }
-  ByteString bsName;
-  bool bFolder;
-  while (true) {
-    if (!FX_GetNextFile(pCurHandle, &bsName, &bFolder)) {
-      FX_CloseFolder(pCurHandle);
-      if (!m_FolderQueue.empty())
-        m_FolderQueue.pop_back();
-      if (m_FolderQueue.empty()) {
-        if (!m_FolderPaths.empty())
-          m_FolderPaths.pop_back();
-        return !m_FolderPaths.empty() ? GetNextFile() : ByteString();
-      }
-      pCurHandle = m_FolderQueue.back().pFolderHandle;
-      continue;
-    }
-    if (bsName == "." || bsName == "..")
-      continue;
-    if (bFolder) {
-      HandleParentPath hpp;
-      hpp.bsParentPath =
-          m_FolderQueue.back().bsParentPath + kFolderSeparator + bsName;
-      hpp.pFolderHandle = FX_OpenFolder(hpp.bsParentPath.c_str());
-      if (!hpp.pFolderHandle)
-        continue;
-      m_FolderQueue.push_back(hpp);
-      pCurHandle = hpp.pFolderHandle;
-      continue;
-    }
-    bsName = m_FolderQueue.back().bsParentPath + kFolderSeparator + bsName;
-    break;
-  }
-  return bsName;
-}
-
-void CFGAS_FontSourceEnumFile::GetNext() {
-  m_wsNext = WideString::FromUTF8(GetNextFile().AsStringView());
-}
-
-bool CFGAS_FontSourceEnumFile::HasNext() const {
-  return !m_wsNext.IsEmpty();
-}
-
-RetainPtr<IFX_SeekableStream> CFGAS_FontSourceEnumFile::GetStream() const {
-  ASSERT(HasNext());
-  return IFX_SeekableStream::CreateFromFilename(m_wsNext.c_str(),
-                                                FX_FILEMODE_ReadOnly);
-}
diff --git a/xfa/fgas/font/cfgas_fontsource_enum_file.h b/xfa/fgas/font/cfgas_fontsource_enum_file.h
deleted file mode 100644
index d7b0c6b..0000000
--- a/xfa/fgas/font/cfgas_fontsource_enum_file.h
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright 2018 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef XFA_FGAS_FONT_CFGAS_FONTSOURCE_ENUM_FILE_H_
-#define XFA_FGAS_FONT_CFGAS_FONTSOURCE_ENUM_FILE_H_
-
-#include <vector>
-
-#include "build/build_config.h"
-#include "core/fxcrt/fx_stream.h"
-#include "core/fxcrt/fx_string.h"
-#include "core/fxcrt/fx_system.h"
-#include "core/fxcrt/retain_ptr.h"
-
-#if defined(OS_WIN)
-#error "Not used on Windows"
-#endif
-
-class CFGAS_FontSourceEnumFile {
- public:
-  CFGAS_FontSourceEnumFile();
-  ~CFGAS_FontSourceEnumFile();
-
-  void GetNext();
-  bool HasNext() const;
-  RetainPtr<IFX_SeekableStream> GetStream() const;
-
- private:
-  struct HandleParentPath {
-    HandleParentPath() = default;
-    HandleParentPath(const HandleParentPath& x) {
-      pFolderHandle = x.pFolderHandle;
-      bsParentPath = x.bsParentPath;
-    }
-    FX_FolderHandle* pFolderHandle;
-    ByteString bsParentPath;
-  };
-
-  ByteString GetNextFile();
-
-  WideString m_wsNext;
-  std::vector<HandleParentPath> m_FolderQueue;
-  std::vector<ByteString> m_FolderPaths;
-};
-
-#endif  // XFA_FGAS_FONT_CFGAS_FONTSOURCE_ENUM_FILE_H_