Allow temporary file system for incognito DevTools.

storage/browser/fileapi/file_system_context.cc

Index: storage/browser/fileapi/file_system_context.cc
diff --git a/storage/browser/fileapi/file_system_context.cc b/storage/browser/fileapi/file_system_context.cc
index f1fcf23eb9d419d6a0297edda3e57b9116a5abc4..d630837708c3c0506b9d4991a67c61dff846e835 100644
--- a/storage/browser/fileapi/file_system_context.cc
+++ b/storage/browser/fileapi/file_system_context.cc
@@ -483,11 +483,9 @@ FileSystemURL FileSystemContext::CreateCrackedFileSystemURL(
   return CrackFileSystemURL(FileSystemURL(origin, type, path));
 }
 
-#if defined(OS_CHROMEOS)
 void FileSystemContext::EnableTemporaryFileSystemInIncognito() {
   sandbox_backend_->set_enable_temporary_file_system_in_incognito(true);
 }
-#endif
 
 bool FileSystemContext::CanServeURLRequest(const FileSystemURL& url) const {
   // We never support accessing files in isolated filesystems via an URL.