Fix DCHECH errors on Windows

headless/app/headless_shell.cc

Index: headless/app/headless_shell.cc
diff --git a/headless/app/headless_shell.cc b/headless/app/headless_shell.cc
index e12d12c2a3fa3106cf6cb34bec25128cb1de992c..dfab4bac8c94401b936c55568e3e0d2a04524795 100644
--- a/headless/app/headless_shell.cc
+++ b/headless/app/headless_shell.cc
@@ -505,13 +505,12 @@ bool ValidateCommandLine(const base::CommandLine& command_line) {
 #if defined(OS_WIN)
 int HeadlessShellMain(HINSTANCE instance,
                       sandbox::SandboxInterfaceInfo* sandbox_info) {
-  base::CommandLine::Init(0, nullptr);
+  RunChildProcessIfNeeded(instance, sandbox_info);
   HeadlessBrowser::Options::Builder builder(0, nullptr);
   builder.SetInstance(instance);
   builder.SetSandboxInfo(std::move(sandbox_info));
 #else
 int HeadlessShellMain(int argc, const char** argv) {
-  base::CommandLine::Init(argc, argv);
   RunChildProcessIfNeeded(argc, argv);
   HeadlessBrowser::Options::Builder builder(argc, argv);
 #endif  // defined(OS_WIN)