mandoline sandbox: prewarm libraries before we raise the sandbox.

mojo/runner/shell_test_main.cc

Index: mojo/runner/shell_test_main.cc
diff --git a/mojo/runner/shell_test_main.cc b/mojo/runner/shell_test_main.cc
index a6ec6d1ba80611c121a3f972a205bf226da5fd8c..753640e3acb080b86e20c50e66ab058e7ef34678 100644
--- a/mojo/runner/shell_test_main.cc
+++ b/mojo/runner/shell_test_main.cc
@@ -9,6 +9,7 @@
 #include "base/test/launcher/unit_test_launcher.h"
 #include "base/test/test_suite.h"
 #include "mojo/runner/child_process.h"
+#include "mojo/runner/native_application_support.h"
 #include "mojo/runner/switches.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -19,8 +20,14 @@ int main(int argc, char** argv) {
 
   if (command_line.HasSwitch(switches::kChildProcess)) {
     base::AtExitManager at_exit;
+    mojo::shell::NativeApplicationCleanup cleanup =
+        command_line.HasSwitch(switches::kDeleteAfterLoad)
+            ? mojo::shell::NativeApplicationCleanup::DELETE
+            : mojo::shell::NativeApplicationCleanup::DONT_DELETE;
+    base::NativeLibrary app_library = mojo::runner::LoadNativeApplication(
+        command_line.GetSwitchValuePath(switches::kChildProcess), cleanup);
 
-    return mojo::runner::ChildProcessMain();
+    return mojo::runner::ChildProcessMain(app_library);
   }
 
   base::TestSuite test_suite(argc, argv);