Revert 158513 - Maybe fix InstantTest.NewWindowDismissesInstant on Mac.

chrome/browser/instant/instant_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/stringprintf.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/history/history_service_factory.h"
 #include "chrome/browser/instant/instant_controller.h"
 #include "chrome/browser/instant/instant_loader.h"
 #include "chrome/browser/prefs/pref_service.h"
@@ skipping 803 matching lines @@
       base::Bind(&KeywordQueryDone, &run_loop3, &queries));
   run_loop3.Run();
   ASSERT_TRUE(queries.size());
   EXPECT_EQ(ASCIIToUTF16("search"), queries[0]);
 }
 
 // Test that creating a new window hides any currently showing Instant preview.
 IN_PROC_BROWSER_TEST_F(InstantTest, NewWindowDismissesInstant) {
   ASSERT_NO_FATAL_FAILURE(SetupInstant("instant.html"));
   EXPECT_TRUE(ui_test_utils::BringBrowserWindowToFront(browser()));
-  base::RunLoop().RunUntilIdle();
   SetOmniboxTextAndWaitForInstantToShow("search");
 
   Browser* previous_window = browser();
   EXPECT_TRUE(instant()->IsCurrent());
   EXPECT_TRUE(instant()->is_showing());
 
   content::WindowedNotificationObserver instant_hidden_observer(
       chrome::NOTIFICATION_INSTANT_CONTROLLER_HIDDEN,
       content::NotificationService::AllSources());
   chrome::NewEmptyWindow(browser()->profile());
@@ skipping 71 matching lines @@
   EXPECT_EQ(WideToUTF16(L"\u0130NSTANT"), omnibox()->GetText());
 
   instant()->Hide();
   SetOmniboxTextAndWaitForInstantToShow("in");
   EXPECT_EQ(ASCIIToUTF16("in"), omnibox()->GetText());
 
   instant()->Hide();
   SetOmniboxTextAndWaitForInstantToShow("IN");
   EXPECT_EQ(ASCIIToUTF16("IN"), omnibox()->GetText());
 }