Remove InProcessBrowserTest::SetUpOnMainThread() calls.

chrome/browser/prefetch/prefetch_browsertest.cc

 // Copyright 2013 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/base_switches.h"
 #include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/net/prediction_options.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 36 matching lines @@
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
     if (disabled_via_field_trial_) {
       command_line->AppendSwitchASCII(switches::kForceFieldTrials,
                                       "Prefetch/ExperimentDisabled/");
     }
   }
 
   void SetUpOnMainThread() override {
     ASSERT_TRUE(embedded_test_server()->Start());
-    InProcessBrowserTest::SetUpOnMainThread();
   }
 
   void SetPreference(NetworkPredictionOptions value) {
     browser()->profile()->GetPrefs()->SetInteger(
         prefs::kNetworkPredictionOptions, value);
   }
 
   bool RunPrefetchExperiment(bool expect_success, Browser* browser) {
     GURL url = embedded_test_server()->GetURL(kPrefetchPage);
 
@@ skipping 70 matching lines @@
       new Browser(Browser::CreateParams(incognito_profile, true));
 
   // Navigate just to have a tab in this window, otherwise there is no
   // WebContents for the incognito browser.
   OpenURLOffTheRecord(browser()->profile(), GURL("about:blank"));
 
   EXPECT_TRUE(RunPrefetchExperiment(true, incognito_browser));
 }
 
 }  // namespace