Lift VFS from clang to llvm (NFC)

This patch moves the virtual file system form clang to llvm so it can be
used by more projects.

Concretely the patch:
 - Moves VirtualFileSystem.{h|cpp} from clang/Basic to llvm/Support.
 - Moves the corresponding unit test from clang to llvm.
 - Moves the vfs namespace from clang::vfs to llvm::vfs.
 - Formats the lines affected by this change, mostly this is the result of
   the added llvm namespace.

RFC on the mailing list:
http://lists.llvm.org/pipermail/llvm-dev/2018-October/126657.html

Differential revision: https://reviews.llvm.org/D52783

llvm-svn: 344140

1 files changed, 3 insertions, 3 deletions

diff --git a/clang-tools-extra/unittests/clangd/TestFS.h b/clang-tools-extra/unittests/clangd/TestFS.h
index 39c0bb22b0e..56bf8a35591 100644
--- a/clang-tools-extra/unittests/clangd/TestFS.h
+++ b/clang-tools-extra/unittests/clangd/TestFS.h
@@ -13,23 +13,23 @@
 #ifndef LLVM_CLANG_TOOLS_EXTRA_UNITTESTS_CLANGD_TESTFS_H
 #define LLVM_CLANG_TOOLS_EXTRA_UNITTESTS_CLANGD_TESTFS_H
 #include "ClangdServer.h"
-#include "clang/Basic/VirtualFileSystem.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/Support/Path.h"
+#include "llvm/Support/VirtualFileSystem.h"
 
 namespace clang {
 namespace clangd {
 
 // Builds a VFS that provides access to the provided files, plus temporary
 // directories.
-llvm::IntrusiveRefCntPtr<vfs::FileSystem>
+llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>
 buildTestFS(llvm::StringMap<std::string> const &Files,
             llvm::StringMap<time_t> const &Timestamps = {});
 
 // A VFS provider that returns TestFSes containing a provided set of files.
 class MockFSProvider : public FileSystemProvider {
 public:
-  IntrusiveRefCntPtr<vfs::FileSystem> getFileSystem() const override {
+  IntrusiveRefCntPtr<llvm::vfs::FileSystem> getFileSystem() const override {
     return buildTestFS(Files);
   }