Stop using nested message loop for alert() and other JS dialogs

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index 40354c26444ca7b998fac5c2e1bb71c497fcbe9f..ada9d5e17b2ef1ca595dbfa58ecb0a210859e1b5 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -690,6 +690,20 @@ bool Browser::IsAttemptingToCloseBrowser() const {
   return unload_controller_->is_attempting_to_close_browser();
 }
 
+bool Browser::ShouldRunUnloadListenerBeforeClosing(
+    content::WebContents* web_contents) {
+  if (IsFastTabUnloadEnabled())
+    return fast_unload_controller_->ShouldRunUnloadEventsHelper(web_contents);
+  return unload_controller_->ShouldRunUnloadEventsHelper(web_contents);
+}
+
+bool Browser::RunUnloadListenerBeforeClosing(
+    content::WebContents* web_contents) {
+  if (IsFastTabUnloadEnabled())
+    return fast_unload_controller_->RunUnloadEventsHelper(web_contents);
+  return unload_controller_->RunUnloadEventsHelper(web_contents);
+}
+
 void Browser::OnWindowClosing() {
   if (!ShouldCloseWindow())
     return;