Improve process launch handle sharing API.

net/test/spawned_test_server/local_test_server_win.cc

Index: net/test/spawned_test_server/local_test_server_win.cc
diff --git a/net/test/spawned_test_server/local_test_server_win.cc b/net/test/spawned_test_server/local_test_server_win.cc
index 65d554eba25e021cf2fe74817b78b3d90c86e8f5..e2780e7fbb9a1a6fc5065151febded0c832fc519 100644
--- a/net/test/spawned_test_server/local_test_server_win.cc
+++ b/net/test/spawned_test_server/local_test_server_win.cc
@@ -125,7 +125,8 @@ bool LocalTestServer::LaunchPython(const base::FilePath& testserver_path) {
       base::IntToString(reinterpret_cast<uintptr_t>(child_write)));
 
   base::LaunchOptions launch_options;
-  launch_options.inherit_handles = true;
+  // TODO(brettw) bug 748258: Share only explicit handles.
+  launch_options.inherit_mode = base::LaunchOptions::Inherit::kAll;
   process_ = base::LaunchProcess(python_command, launch_options);
   if (!process_.IsValid()) {
     LOG(ERROR) << "Failed to launch " << python_command.GetCommandLineString();