Add a sandbox API for broker handle duplication

sandbox/tests/common/controller.h

Index: sandbox/tests/common/controller.h
===================================================================
--- sandbox/tests/common/controller.h	(revision 128951)
+++ sandbox/tests/common/controller.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -8,6 +8,7 @@
 #include <windows.h>
 #include <string>
 
+#include "base/win/scoped_handle.h"
 #include "sandbox/src/sandbox.h"
 
 namespace sandbox {
@@ -91,6 +92,9 @@
   // Sets the timeout value for the child to run the command and return.
   void SetTimeout(DWORD timeout_ms);
 
+  // Sets TestRunner to return without waiting for the process to exit.
+  void SetAsynchronous(bool is_async) { is_async_ = is_async; }
+
   // Sets the desired state for the test to run.
   void SetTestState(SboxTestsState desired_state);
 
@@ -98,6 +102,12 @@
   // the policy manually.
   TargetPolicy* GetPolicy();
 
+  // Return the process handle for an asynchronous test.
+  HANDLE process() { return target_process_; }
+
+  // Return the process ID for an asynchronous test.
+  DWORD process_id() { return target_process_id_; }
+
  private:
   // Initializes the data in the object. Sets is_init_ to tree if the
   // function succeeds. This is meant to be called from the constructor.
@@ -112,6 +122,9 @@
   DWORD timeout_;
   SboxTestsState state_;
   bool is_init_;
+  bool is_async_;
+  base::win::ScopedHandle target_process_;
+  DWORD target_process_id_;
 };
 
 // Returns the broker services.