Remove pointless InProcessBrowserTest calls.

chrome/browser/extensions/extension_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 "chrome/browser/extensions/extension_browsertest.h"
 
 #include <stddef.h>
 
 #include <utility>
 #include <vector>
@@ skipping 189 matching lines @@
   test_root_path = test_root_path.AppendASCII("extensions");
   test_protocol_handler_ =
       base::Bind(&ExtensionProtocolTestHandler, test_root_path);
   extensions::SetExtensionProtocolTestHandler(&test_protocol_handler_);
 }
 
 void ExtensionBrowserTest::TearDownOnMainThread() {
   ExtensionMessageBubbleFactory::set_override_for_tests(
       ExtensionMessageBubbleFactory::NO_OVERRIDE);
   extensions::SetExtensionProtocolTestHandler(nullptr);
-  InProcessBrowserTest::TearDownOnMainThread();
 }
 
 const Extension* ExtensionBrowserTest::LoadExtension(
     const base::FilePath& path) {
   return LoadExtensionWithFlags(path, kFlagEnableFileAccess);
 }
 
 const Extension* ExtensionBrowserTest::LoadExtensionIncognito(
     const base::FilePath& path) {
   return LoadExtensionWithFlags(path,
@@ skipping 382 matching lines @@
   return extensions::browsertest_util::ExecuteScriptInBackgroundPage(
       profile(), extension_id, script);
 }
 
 bool ExtensionBrowserTest::ExecuteScriptInBackgroundPageNoWait(
     const std::string& extension_id,
     const std::string& script) {
   return extensions::browsertest_util::ExecuteScriptInBackgroundPageNoWait(
       profile(), extension_id, script);
 }