Mark the network bubble task as MayBlock to prevent it from crashing the browser.

chrome/browser/ui/network_profile_bubble.cc

Index: chrome/browser/ui/network_profile_bubble.cc
diff --git a/chrome/browser/ui/network_profile_bubble.cc b/chrome/browser/ui/network_profile_bubble.cc
index e9d59974172577ee7bc2a506266059885b5de6b6..5b026039c97f17fe2baf884404b9297450f8fa02 100644
--- a/chrome/browser/ui/network_profile_bubble.cc
+++ b/chrome/browser/ui/network_profile_bubble.cc
@@ -90,7 +90,6 @@ bool NetworkProfileBubble::ShouldCheckNetworkProfile(Profile* profile) {
 // static
 void NetworkProfileBubble::CheckNetworkProfile(
     const base::FilePath& profile_folder) {
-  DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
   // On Windows notify the users if their profiles are located on a network
   // share as we don't officially support this setup yet.
   // However we don't want to bother users on Cytrix setups as those have no