Update some host_resolver()->AddRules in chrome/browser.

chrome/browser/extensions/extension_override_apitest.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 <stddef.h>
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
@@ skipping 18 matching lines @@
 #include "extensions/test/result_catcher.h"
 #include "net/dns/mock_host_resolver.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 
 using content::WebContents;
 
 namespace extensions {
 
 class ExtensionOverrideTest : public ExtensionApiTest {
  protected:
+  void SetUpOnMainThread() override {
+    ExtensionApiTest::SetUpOnMainThread();
+    host_resolver()->AddRule("*", "127.0.0.1");
+    ASSERT_TRUE(embedded_test_server()->Start());
+  }
+
   bool CheckHistoryOverridesContainsNoDupes() {
     // There should be no duplicate entries in the preferences.
     const base::DictionaryValue* overrides =
         browser()->profile()->GetPrefs()->GetDictionary(
             ExtensionWebUI::kExtensionURLOverrides);
 
     const base::ListValue* values = nullptr;
     if (!overrides->GetList("history", &values))
       return false;
 
@@ skipping 148 matching lines @@
   ASSERT_TRUE(tab->GetController().GetVisibleEntry());
   EXPECT_FALSE(tab->GetController().GetVisibleEntry()->GetURL().
                SchemeIs(kExtensionScheme));
 }
 
 // Check that when an overridden new tab page has focus, a subframe navigation
 // on that page does not steal the focus away by focusing the omnibox.
 // See https://crbug.com/700124.
 IN_PROC_BROWSER_TEST_F(ExtensionOverrideTest,
                        SubframeNavigationInOverridenNTPDoesNotAffectFocus) {
-  host_resolver()->AddRule("*", "127.0.0.1");
-  ASSERT_TRUE(embedded_test_server()->Start());
-
   // Load an extension that overrides the new tab page.
   const Extension* extension = LoadExtension(data_dir().AppendASCII("newtab"));
 
   // Navigate to the new tab page.  The overridden new tab page
   // will call chrome.test.sendMessage('controlled by first').
   ExtensionTestMessageListener listener("controlled by first", false);
   ui_test_utils::NavigateToURL(browser(), GURL(chrome::kChromeUINewTabURL));
   WebContents* contents = browser()->tab_strip_model()->GetActiveWebContents();
   EXPECT_TRUE(ExtensionControlsPage(contents, extension->id()));
   EXPECT_TRUE(listener.WaitUntilSatisfied());
@@ skipping 73 matching lines @@
   }
 
   ASSERT_FALSE(CheckHistoryOverridesContainsNoDupes());
 
   ExtensionWebUI::InitializeChromeURLOverrides(profile());
 
   ASSERT_TRUE(CheckHistoryOverridesContainsNoDupes());
 }
 
 }  // namespace extensions