Linux Sandbox: always discover Zygote PID properly

content/zygote/zygote_linux.h

 // 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.
 
 #ifndef CONTENT_ZYGOTE_ZYGOTE_H_
 #define CONTENT_ZYGOTE_ZYGOTE_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 35 matching lines @@
       ZygoteProcessMap;
 
   // Retrieve a ZygoteProcessInfo from the process_info_map_.
   // Returns true and write to process_info if |pid| can be found, return
   // false otherwise.
   bool GetProcessInfo(base::ProcessHandle pid,
                       ZygoteProcessInfo* process_info);
 
   // Returns true if the SUID sandbox is active.
   bool UsingSUIDSandbox() const;
+  // Returns true if the NS sandbox is active.
+  bool UsingNSSandbox() const;
 
   // ---------------------------------------------------------------------------
   // Requests from the browser...
 
   // Read and process a request from the browser. Returns true if we are in a
   // new process and thus need to unwind back into ChromeMain.
   bool HandleRequestFromBrowser(int fd);
 
   void HandleReapRequest(int fd, PickleIterator iter);
 
@@ skipping 64 matching lines @@
   std::vector<base::ProcessHandle> extra_children_;
 
   // This vector contains the FDs that must be closed before reaping the extra
   // children.
   std::vector<int> extra_fds_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_ZYGOTE_ZYGOTE_H_