Get headless_shell building on Windows.

headless/app/headless_shell_main.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "headless/public/headless_shell.h"
+#include "content/public/common/main_function_params.h"
 
 int main(int argc, const char** argv) {
   return headless::HeadlessShellMain(argc, argv);
 }
+
+namespace content {

[dvallet, 2017/02/13 03:20:24]

afaik Ppapi is only included in component build, so you don't need to add this
if add "is_component_build = true") to your args)

+    int PpapiBrokerMain(const MainFunctionParams& parameters) {
+        return 0;
+    };
+    int PpapiPluginMain(const MainFunctionParams& parameters) {
+        return 0;
+    }
+}