Reland of Add --headless flag to Windows

headless/public/headless_browser.h

Index: headless/public/headless_browser.h
diff --git a/headless/public/headless_browser.h b/headless/public/headless_browser.h
index 4b18f565b9e8fc2f2b8cb91ad0bb885a26a8a64e..b57c21aac9214912e77db31c929e8dfd6916a9d5 100644
--- a/headless/public/headless_browser.h
+++ b/headless/public/headless_browser.h
@@ -22,6 +22,10 @@
 #include "net/base/ip_endpoint.h"
 #include "ui/gfx/geometry/size.h"
 
+#if defined(OS_WIN)
+#include "sandbox/win/src/sandbox_types.h"
+#endif
+
 namespace base {
 class MessagePump;
 class SingleThreadTaskRunner;
@@ -89,7 +93,7 @@
 };
 
 // Embedding API overrides for the headless browser.
-struct HeadlessBrowser::Options {
+struct HEADLESS_EXPORT HeadlessBrowser::Options {
   class Builder;
 
   Options(Options&& options);
@@ -100,6 +104,14 @@
   // Command line options to be passed to browser.
   int argc;
   const char** argv;
+
+#if defined(OS_WIN)
+  // Set hardware instance if available, otherwise it defaults to 0.
+  HINSTANCE instance;
+
+  // Set with sandbox information. This has to be already initialized.
+  sandbox::SandboxInterfaceInfo* sandbox_info;
+#endif
 
   // Address at which DevTools should listen for connections. Disabled by
   // default.
@@ -172,7 +184,7 @@
   DISALLOW_COPY_AND_ASSIGN(Options);
 };
 
-class HeadlessBrowser::Options::Builder {
+class HEADLESS_EXPORT HeadlessBrowser::Options::Builder {
  public:
   Builder(int argc, const char** argv);
   Builder();
@@ -186,6 +198,10 @@
   Builder& SetDisableSandbox(bool disable_sandbox);
   Builder& SetGLImplementation(const std::string& gl_implementation);
   Builder& AddMojoServiceName(const std::string& mojo_service_name);
+#if defined(OS_WIN)
+  Builder& SetInstance(HINSTANCE instance);
+  Builder& SetSandboxInfo(sandbox::SandboxInterfaceInfo* sandbox_info);
+#endif
 
   // Per-context settings.
 
@@ -229,7 +245,9 @@
 //
 // [1]
 // https://chromium.googlesource.com/chromium/src/+/master/docs/linux_zygote.md
-void RunChildProcessIfNeeded(int argc, const char** argv);
+#if !defined(OS_WIN)
+HEADLESS_EXPORT void RunChildProcessIfNeeded(int argc, const char** argv);
+#endif
 
 // Main entry point for running the headless browser. This function constructs
 // the headless browser instance, passing it to the given
@@ -237,7 +255,7 @@
 // the main loop, it will only return after HeadlessBrowser::Shutdown() is
 // called, returning the exit code for the process. It is not possible to
 // initialize the browser again after it has been torn down.
-int HeadlessBrowserMain(
+HEADLESS_EXPORT int HeadlessBrowserMain(
     HeadlessBrowser::Options options,
     const base::Callback<void(HeadlessBrowser*)>& on_browser_start_callback);