Don't use base::MessageLoop::{Quit,QuitClosure} in chrome/

chrome/browser/captive_portal/captive_portal_browsertest.cc

Index: chrome/browser/captive_portal/captive_portal_browsertest.cc
diff --git a/chrome/browser/captive_portal/captive_portal_browsertest.cc b/chrome/browser/captive_portal/captive_portal_browsertest.cc
index 1bca5ec4416d7317a4b8ae93533fd5597fe02431..d6a50c68239aadab9135dade83f3284392b21b7a 100644
--- a/chrome/browser/captive_portal/captive_portal_browsertest.cc
+++ b/chrome/browser/captive_portal/captive_portal_browsertest.cc
@@ -319,7 +319,7 @@ void URLRequestTimeoutOnDemandJob::MaybeStopWaitingForJobsOnIOThread() {
     last_num_jobs_to_wait_for_ = num_jobs_to_wait_for_;
     num_jobs_to_wait_for_ = 0;
     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-                            base::MessageLoop::QuitClosure());
+                            base::MessageLoop::QuitWhenIdleClosure());
   }
 }
 
@@ -651,7 +651,7 @@ void MultiNavigationObserver::Observe(
   if (waiting_for_navigation_ &&
       num_navigations_to_wait_for_ == num_navigations_) {
     waiting_for_navigation_ = false;
-    base::MessageLoopForUI::current()->Quit();
+    base::MessageLoopForUI::current()->QuitWhenIdle();
   }
 }
 
@@ -741,7 +741,7 @@ void FailLoadsAfterLoginObserver::Observe(
       tabs_needing_navigation_.size() ==
           tabs_navigated_to_final_destination_.size()) {
     waiting_for_navigation_ = false;
-    base::MessageLoopForUI::current()->Quit();
+    base::MessageLoopForUI::current()->QuitWhenIdle();
   }
 }
 
@@ -835,7 +835,7 @@ void CaptivePortalObserver::Observe(
   if (waiting_for_result_ &&
       num_results_to_wait_for_ == num_results_received_) {
     waiting_for_result_ = false;
-    base::MessageLoop::current()->Quit();
+    base::MessageLoop::current()->QuitWhenIdle();
   }
 }