Allow showing pending URL for new tab navigations, but only if safe.

chrome/browser/managed_mode/managed_mode_browsertest.cc

Index: chrome/browser/managed_mode/managed_mode_browsertest.cc
diff --git a/chrome/browser/managed_mode/managed_mode_browsertest.cc b/chrome/browser/managed_mode/managed_mode_browsertest.cc
index ec718e7f34596054e6e0a14c2e6008a08fa191e0..d3a53d6406e3f4994584b5814e22cb4471569ab5 100644
--- a/chrome/browser/managed_mode/managed_mode_browsertest.cc
+++ b/chrome/browser/managed_mode/managed_mode_browsertest.cc
@@ -175,6 +175,9 @@ class ManagedModeBlockModeTest : public InProcessBrowserTest {
           content::NotificationService::AllSources());
       InfoBarService* infobar_service =
           InfoBarService::FromWebContents(tab);
+      content::WindowedNotificationObserver back_observer(
+          content::NOTIFICATION_LOAD_STOP,
+          content::Source<NavigationController>(&tab->GetController()));
 
       switch (infobar_action) {
         case INFOBAR_ACCEPT:
@@ -185,6 +188,7 @@ class ManagedModeBlockModeTest : public InProcessBrowserTest {
         case INFOBAR_CANCEL:
           confirm_info_bar_delegate->InfoBarDismissed();
           ASSERT_FALSE(confirm_info_bar_delegate->Cancel());
+          back_observer.Wait();
           infobar_service->RemoveInfoBar(confirm_info_bar_delegate);
           break;
         case INFOBAR_ALREADY_ADDED: