Remove InProcessBrowserTest::SetUpOnMainThread() calls.

chrome/browser/plugins/plugin_power_saver_browsertest.cc

 // Copyright 2015 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 <stdint.h>
 #include <string>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 241 matching lines @@
 class PluginPowerSaverBrowserTest : public InProcessBrowserTest {
  public:
   void SetUp() override {
     if (PixelTestsEnabled())
       EnablePixelOutput();
 
     InProcessBrowserTest::SetUp();
   }
 
   void SetUpOnMainThread() override {
-    InProcessBrowserTest::SetUpOnMainThread();
-
     embedded_test_server()->ServeFilesFromDirectory(
         ui_test_utils::GetTestFilePath(
             base::FilePath(FILE_PATH_LITERAL("plugin_power_saver")),
             base::FilePath()));
     ASSERT_TRUE(embedded_test_server()->Start());
   }
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitch(switches::kEnablePluginPlaceholderTesting);
     ASSERT_TRUE(ppapi::RegisterFlashTestPlugin(command_line));
@@ skipping 363 matching lines @@
 IN_PROC_BROWSER_TEST_F(PluginPowerSaverPreferHtmlBrowserTest,
                        ThrottlePluginsOnAllowContentSetting) {
   HostContentSettingsMap* content_settings_map =
       HostContentSettingsMapFactory::GetForProfile(browser()->profile());
 
   content_settings_map->SetDefaultContentSetting(CONTENT_SETTINGS_TYPE_PLUGINS,
                                                  CONTENT_SETTING_ALLOW);
   LoadPeripheralPlugin();
   VerifyPluginIsThrottled(GetActiveWebContents(), "plugin");
 }