Replace IOAllowed with WaitAllowed in PlatformThread::Join()

content/browser/browser_process_sub_thread.cc

Index: content/browser/browser_process_sub_thread.cc
diff --git a/content/browser/browser_process_sub_thread.cc b/content/browser/browser_process_sub_thread.cc
index 71f1396dbdef051e5e05126d34f65568bd6d19cf..022b7161bcd3f0c99895ecbf317a3e2d146c7ce8 100644
--- a/content/browser/browser_process_sub_thread.cc
+++ b/content/browser/browser_process_sub_thread.cc
@@ -73,7 +73,10 @@ void BrowserProcessSubThread::IOThreadPreCleanUp() {
   // If any child processes are still running, terminate them and
   // and delete the BrowserChildProcessHost instances to release whatever
   // IO thread only resources they are referencing.
-  BrowserChildProcessHostImpl::TerminateAll();
+  {
+    base::ThreadRestrictions::ScopedAllowWait allow_wait_to_stop_child_procs;
+    BrowserChildProcessHostImpl::TerminateAll();
+  }
 
   // Unregister GpuMemoryBuffer dump provider before IO thread is shut down.
   base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(