Revert of Add --headless flag to Windows

headless/public/headless_browser.cc

Index: headless/public/headless_browser.cc
diff --git a/headless/public/headless_browser.cc b/headless/public/headless_browser.cc
index 58067c7d570b176e4b48dde746ec04eb522607a8..64e31a85deb612ded4d8c3f338cd21a162852b5f 100644
--- a/headless/public/headless_browser.cc
+++ b/headless/public/headless_browser.cc
@@ -8,10 +8,6 @@
 
 #include "content/public/common/user_agent.h"
 #include "headless/public/version.h"
-
-#if defined(OS_WIN)
-#include "sandbox/win/src/sandbox_types.h"
-#endif
 
 using Options = headless::HeadlessBrowser::Options;
 using Builder = headless::HeadlessBrowser::Options::Builder;
@@ -31,10 +27,6 @@
 Options::Options(int argc, const char** argv)
     : argc(argc),
       argv(argv),
-#if defined(OS_WIN)
-      instance(0),
-      sandbox_info(nullptr),
-#endif
       message_pump(nullptr),
       single_process_mode(false),
       disable_sandbox(false),
@@ -113,18 +105,6 @@
   return *this;
 }
 
-#if defined(OS_WIN)
-Builder& Builder::SetInstance(HINSTANCE instance) {
-  options_.instance = instance;
-  return *this;
-}
-
-Builder& Builder::SetSandboxInfo(sandbox::SandboxInterfaceInfo* sandbox_info) {
-  options_.sandbox_info = sandbox_info;
-  return *this;
-}
-#endif  // defined(OS_WIN)
-
 Builder& Builder::SetUserDataDir(const base::FilePath& user_data_dir) {
   options_.user_data_dir = user_data_dir;
   return *this;