base: Move renderer threads to the appropriate cpuset.

base/linux_util.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 BASE_LINUX_UTIL_H_
 #define BASE_LINUX_UTIL_H_
 
 #include <stdint.h>
 #include <sys/types.h>
 
@@ skipping 15 matching lines @@
 
 // For a given process |pid|, look through all its threads and find the first
 // thread with /proc/[pid]/task/[thread_id]/syscall whose first N bytes matches
 // |expected_data|, where N is the length of |expected_data|.
 // Returns the thread id or -1 on error.  If |syscall_supported| is
 // set to false the kernel does not support syscall in procfs.
 BASE_EXPORT pid_t FindThreadIDWithSyscall(pid_t pid,
                                           const std::string& expected_data,
                                           bool* syscall_supported);
 
+// For a given process |pid|, look through all its threads and find the first
+// thread with /proc/[pid]/task/[thread_id]/status where NSpid matches |ns_tid|.
+// Returns the thread id or -1 on error.  If |ns_pid_supported| is
+// set to false the kernel does not support NSpid in procfs.
+BASE_EXPORT pid_t FindThreadID(pid_t pid, pid_t ns_tid, bool* ns_pid_supported);
+
 }  // namespace base
 
 #endif  // BASE_LINUX_UTIL_H_