[lldb-dap] Gardening in lldb-dap.cpp (NFC) (#128949)

- Remove more unused includes
 - Limit anonymous namespace to llvm::opt
 - Fix code style

lldb/tools/lldb-dap/lldb-dap.cpp

@@ -1,4 +1,4 @@
-//===-- lldb-dap.cpp -----------------------------------------*- C++ -*-===//
+//===-- lldb-dap.cpp ------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -8,10 +8,7 @@
 
 #include "DAP.h"
 #include "EventHelper.h"
-#include "FifoFiles.h"
 #include "Handler/RequestHandler.h"
-#include "JSONUtils.h"
-#include "LLDBUtils.h"
 #include "RunInTerminal.h"
 #include "lldb/API/SBStream.h"
 #include "lldb/Host/Config.h"
@@ -38,22 +35,15 @@
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/Threading.h"
 #include "llvm/Support/raw_ostream.h"
-#include <algorithm>
 #include <condition_variable>
-#include <cstdint>
 #include <cstdio>
 #include <cstdlib>
-#include <cstring>
 #include <fcntl.h>
 #include <fstream>
 #include <map>
 #include <memory>
 #include <mutex>
-#include <optional>
-#include <ostream>
 #include <string>
-#include <sys/stat.h>
-#include <sys/types.h>
 #include <thread>
 #include <utility>
 #include <vector>
@@ -118,8 +108,9 @@ public:
       : llvm::opt::GenericOptTable(OptionStrTable, OptionPrefixesTable,
                                    InfoTable, true) {}
 };
+} // anonymous namespace
 
-void RegisterRequestCallbacks(DAP &dap) {
+static void RegisterRequestCallbacks(DAP &dap) {
   dap.RegisterRequest<AttachRequestHandler>();
   dap.RegisterRequest<BreakpointLocationsRequestHandler>();
   dap.RegisterRequest<CompletionsRequestHandler>();
@@ -160,9 +151,7 @@ void RegisterRequestCallbacks(DAP &dap) {
   dap.RegisterRequest<TestGetTargetBreakpointsRequestHandler>();
 }
 
-} // anonymous namespace
-
-static void printHelp(LLDBDAPOptTable &table, llvm::StringRef tool_name) {
+static void PrintHelp(LLDBDAPOptTable &table, llvm::StringRef tool_name) {
   std::string usage_str = tool_name.str() + " options";
   table.printHelp(llvm::outs(), usage_str.c_str(), "LLDB DAP", false);
 
@@ -433,7 +422,7 @@ int main(int argc, char *argv[]) {
   llvm::opt::InputArgList input_args = T.ParseArgs(ArgsArr, MAI, MAC);
 
   if (input_args.hasArg(OPT_help)) {
-    printHelp(T, llvm::sys::path::filename(argv[0]));
+    PrintHelp(T, llvm::sys::path::filename(argv[0]));
     return EXIT_SUCCESS;
   }