[clangd] Cleanup: stop passing around list of supported URI schemes.

Summary:
Instead of passing around a list of supported URI schemes in clangd, we
expose an interface to convert a path to URI using any compatible scheme
that has been registered. It favors customized schemes and falls
back to "file" when no other scheme works.

Changes in this patch are:
- URI::create(AbsPath, URISchemes) -> URI::create(AbsPath). The new API finds a
compatible scheme from the registry.
- Remove URISchemes option everywhere (ClangdServer, SymbolCollecter, FileIndex etc).
- Unit tests will use "unittest" by default.
- Move "test" scheme from ClangdLSPServer to ClangdMain.cpp, and only
register the test scheme when lit-test or enable-lit-scheme is set.
(The new flag is added to make lit protocol.test work; I wonder if there
is alternative here.)

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, kadircet, cfe-commits

Differential Revision: https://reviews.llvm.org/D54800

llvm-svn: 347467

1 files changed, 1 insertions, 2 deletions

diff --git a/clang-tools-extra/clangd/ClangdServer.cpp b/clang-tools-extra/clangd/ClangdServer.cpp
index 8da5dec414f..8d925d7cdca 100644
--- a/clang-tools-extra/clangd/ClangdServer.cpp
+++ b/clang-tools-extra/clangd/ClangdServer.cpp
@@ -106,8 +106,7 @@ ClangdServer::ClangdServer(const GlobalCompilationDatabase &CDB,
       ResourceDir(Opts.ResourceDir ? *Opts.ResourceDir
                                    : getStandardResourceDir()),
       DynamicIdx(Opts.BuildDynamicSymbolIndex
-                     ? new FileIndex(Opts.URISchemes,
-                                     Opts.HeavyweightDynamicSymbolIndex)
+                     ? new FileIndex(Opts.HeavyweightDynamicSymbolIndex)
                      : nullptr),
       WorkspaceRoot(Opts.WorkspaceRoot),
       PCHs(std::make_shared<PCHContainerOperations>()),