Remove InProcessBrowserTest::SetUpOnMainThread() calls.

chrome/browser/push_messaging/push_messaging_browsertest.cc

 // Copyright 2014 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 <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <string>
 
@@ skipping 146 matching lines @@
         gcm_service_->driver());
 
     push_service_ =
         PushMessagingServiceFactory::GetForProfile(GetBrowser()->profile());
     display_service_.reset(new MessageCenterDisplayService(
         GetBrowser()->profile(), notification_manager_.get()));
     notification_service()->SetNotificationDisplayServiceForTesting(
         display_service_.get());
 
     LoadTestPage();
-    InProcessBrowserTest::SetUpOnMainThread();
   }
 
   // Calls should be wrapped in the ASSERT_NO_FATAL_FAILURE() macro.
   void RestartPushService() {
     Profile* profile = GetBrowser()->profile();
     PushMessagingServiceFactory::GetInstance()->SetTestingFactory(profile,
                                                                   nullptr);
     ASSERT_EQ(nullptr, PushMessagingServiceFactory::GetForProfile(profile));
     PushMessagingServiceFactory::GetInstance()->RestoreFactoryForTests(profile);
     PushMessagingServiceImpl::InitializeForProfile(profile);
@@ skipping 2227 matching lines @@
   push_service()->SetUnsubscribeCallbackForTesting(run_loop.QuitClosure());
   ASSERT_TRUE(RunScript("unsubscribePush()", &script_result));
   EXPECT_EQ("unsubscribe result: true", script_result);
   // Background mode is only guaranteed to have updated once the unsubscribe
   // callback for testing has been run (PushSubscription.unsubscribe() usually
   // resolves before that, in order to avoid blocking on network retries etc).
   run_loop.Run();
   ASSERT_FALSE(background_mode_manager->IsBackgroundModeActive());
 }
 #endif  // BUILDFLAG(ENABLE_BACKGROUND) && !defined(OS_CHROMEOS)