Replace IOAllowed with WaitAllowed in PlatformThread::Join()

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 9a6a2bb999c4fe80adc83f874a0a08ea7b72116c..b2cd67e8083305c6d26e9a701f71c6f8b3c7154d 100644
--- a/base/threading/platform_thread_posix.cc
+++ b/base/threading/platform_thread_posix.cc
@@ -211,13 +211,14 @@ bool PlatformThread::CreateNonJoinableWithPriority(size_t stack_size,
 
 // static
 void PlatformThread::Join(PlatformThreadHandle thread_handle) {
-  // Record the event that this thread is blocking upon (for hang diagnosis).
-  base::debug::ScopedThreadJoinActivity thread_activity(&thread_handle);
-
   // Joining another thread may block the current thread for a long time, since
   // the thread referred to by |thread_handle| may still be running long-lived /
   // blocking tasks.
-  base::ThreadRestrictions::AssertIOAllowed();
+  base::ThreadRestrictions::AssertWaitAllowed();
+
+  // Record the event that this thread is blocking upon (for hang diagnosis).
+  base::debug::ScopedThreadJoinActivity thread_activity(&thread_handle);
+
   CHECK_EQ(0, pthread_join(thread_handle.platform_handle(), NULL));
 }