Add a sandbox API for broker handle duplication

sandbox/src/sandbox.h

Index: sandbox/src/sandbox.h
===================================================================
--- sandbox/src/sandbox.h	(revision 128951)
+++ sandbox/src/sandbox.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 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.
 
@@ -84,6 +84,12 @@
   //   If the return is ERROR_GENERIC, you can call ::GetLastError() to get
   //   more information.
   virtual ResultCode WaitForAllTargets() = 0;
+
+  // Checks if the supplied process ID matches one of the broker's active
+  // target processes
+  // Returns:
+  //   true if there is an active target process for this ID, otherwise false.
+  virtual bool IsActiveTarget(DWORD process_id) = 0;

[rvargas (doing something else), 2012/03/27 00:35:33]

In general, this interface is intended for the user, not for internal code.

[jschuh, 2012/03/27 01:36:19]

I exposed it because it seemed generally useful. For example, I used it in the
test code.

 };
 
 // TargetServices models the current process from the perspective
@@ -126,6 +132,21 @@
   // information about the current state of the process, such as whether
   // LowerToken has been called or not.
   virtual ProcessState* GetState() = 0;
+
+  // Requests the broker to duplicate the supplied handle into the target
+  // process. The target process must be an active sandbox child process
+  // and the source process must have a corresponding policy allowing
+  // handle duplication for this object type.
+  // Returns:
+  //   ALL_OK if successful. All other return values imply failure.
+  //   If the return is ERROR_GENERIC, you can call ::GetLastError() to get
+  //   more information.
+  virtual ResultCode DuplicateHandle(HANDLE source_handle,
+                                     DWORD target_process_id,
+                                     HANDLE* target_handle,
+                                     DWORD desired_access,
+                                     BOOL inherit_handle,
+                                     DWORD options) = 0;
 };
 
 }  // namespace sandbox