content: Implement dynamic priorities for raster threads.

base/threading/platform_thread_posix.cc

 // 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.
 
 #include "base/threading/platform_thread.h"
 
 #include <errno.h>
 #include <pthread.h>
 #include <sched.h>
 #include <stddef.h>
@@ skipping 241 matching lines @@
   if (errno != 0) {
     DVPLOG(1) << "Failed to get nice value of thread ("
               << PlatformThread::CurrentId() << ")";
     return ThreadPriority::NORMAL;
   }
 
   return internal::NiceValueToThreadPriority(nice_value);
 #endif  // !defined(OS_NACL)
 }
 
+// static
+bool PlatformThread::SetChildThreadPriorityInCurrentProcess(
+    PlatformThreadHandle thread_handle,
+    PlatformThreadId tid,
+    ThreadPriority priority) {
+  // FIXME: Add check for caller process and thread's process.
+  return internal::SetChildThreadPriorityInCurrentProcess(tid, priority);
+}
+
 #endif  // !defined(OS_MACOSX)
 
 }  // namespace base