Remove InProcessBrowserTest::SetUpOnMainThread() calls.

chrome/browser/net/proxy_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/command_line.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 294 matching lines @@
 
   void SetUpOnMainThread() override {
     // This must be created after the main message loop has been set up.
     // Waits for one connection.  Additional connections are fine.
     connection_listener_ =
         base::MakeUnique<net::test_server::SimpleConnectionListener>(
             1, net::test_server::SimpleConnectionListener::
                    ALLOW_ADDITIONAL_CONNECTIONS);
     embedded_test_server()->SetConnectionListener(connection_listener_.get());
     embedded_test_server()->StartAcceptingConnections();
-
-    InProcessBrowserTest::SetUpOnMainThread();
   }
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitchASCII(
         switches::kProxyPacUrl, embedded_test_server()->GetURL("/hung").spec());
   }
 
  protected:
   std::unique_ptr<net::test_server::SimpleConnectionListener>
       connection_listener_;
@@ skipping 27 matching lines @@
   std::unique_ptr<net::URLFetcher> hanging_fetcher = net::URLFetcher::Create(
       GURL("http://blah/"), net::URLFetcher::GET, &hanging_request_delegate,
       TRAFFIC_ANNOTATION_FOR_TESTS);
   hanging_fetcher->SetRequestContext(browser()->profile()->GetRequestContext());
   hanging_fetcher->Start();
 
   connection_listener_->WaitForConnections();
 }
 
 }  // namespace