Turn FileDescriptorInfo a collection class

content/browser/zygote_host/zygote_host_impl_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_BROWSER_ZYGOTE_HOST_ZYGOTE_HOST_IMPL_LINUX_H_
 #define CONTENT_BROWSER_ZYGOTE_HOST_ZYGOTE_HOST_IMPL_LINUX_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 16 matching lines @@
 
   void Init(const std::string& sandbox_cmd);
 
   // After the last known Zygote child exits, notify the Zygote to exit.
   void TearDownAfterLastChild();
 
   // Tries to start a process of type indicated by process_type.
   // Returns its pid on success, otherwise
   // base::kNullProcessHandle;
   pid_t ForkRequest(const std::vector<std::string>& command_line,
-                    const std::vector<FileDescriptorInfo>& mapping,
+                    scoped_ptr<FileDescriptorInfo> mapping,
                     const std::string& process_type);
   void EnsureProcessTerminated(pid_t process);
 
   // Get the termination status (and, optionally, the exit code) of
   // the process. |exit_code| is set to the exit code of the child
   // process. (|exit_code| may be NULL.)
   // Unfortunately the Zygote can not accurately figure out if a process
   // is already dead without waiting synchronously for it.
   // |known_dead| should be set to true when we already know that the process
   // is dead. When |known_dead| is false, processes could be seen as
@@ skipping 48 matching lines @@
   // A lock protecting list_of_running_zygote_children_ and
   // should_teardown_after_last_child_exits_.
   base::Lock child_tracking_lock_;
   std::set<pid_t> list_of_running_zygote_children_;
   bool should_teardown_after_last_child_exits_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ZYGOTE_HOST_ZYGOTE_HOST_IMPL_LINUX_H_