base: Set initial thread priority in ThreadFunc.

base/threading/platform_thread_posix.cc

Index: base/threading/platform_thread_posix.cc
diff --git a/base/threading/platform_thread_posix.cc b/base/threading/platform_thread_posix.cc
index 39a007316f783f541b1a92da04237aaa8955ad91..75704a053371572f096fd0e36277520ac680b995 100644
--- a/base/threading/platform_thread_posix.cc
+++ b/base/threading/platform_thread_posix.cc
@@ -56,8 +56,10 @@ void* ThreadFunc(void* params) {
     if (!thread_params->joinable)
       base::ThreadRestrictions::SetSingletonAllowed(false);
 
-    if (thread_params->priority != ThreadPriority::NORMAL)
-      PlatformThread::SetCurrentThreadPriority(thread_params->priority);
+    // Threads on linux/android may inherit their priority from the thread
+    // where they were created. This explicitly sets the priority of all new
+    // threads.
+    PlatformThread::SetCurrentThreadPriority(thread_params->priority);
   }
 
   ThreadIdNameManager::GetInstance()->RegisterThread(