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

chrome/browser/download/download_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/download/download_browsertest.h"
 
 #include <stdint.h>
 
 #include <memory>
 #include <set>
@@ skipping 413 matching lines @@
     content::TestFileErrorInjector::FileErrorInfo error_info;
   };
 
   DownloadTest() {}
 
   void SetUpOnMainThread() override {
     BrowserThread::PostTask(
         BrowserThread::IO, FROM_HERE,
         base::BindOnce(&chrome_browser_net::SetUrlRequestMocksEnabled, true));
     ASSERT_TRUE(InitialSetup());
+    host_resolver()->AddRule("www.a.com", "127.0.0.1");
   }
 
   void TearDownOnMainThread() override {
     // Needs to be torn down on the main thread. file_activity_observer_ holds a
     // reference to the ChromeDownloadManagerDelegate which should be destroyed
     // on the UI thread.
     file_activity_observer_.reset();
   }
 
   // Returning false indicates a failure of the setup, and should be asserted
@@ skipping 2360 matching lines @@
   ASSERT_EQ(img_url, download_items[0]->GetOriginalUrl());
   base::FilePath file = download_items[0]->GetTargetFilePath();
   // The contents of the file is the value of the Referer header if there was
   // one.
   EXPECT_TRUE(VerifyFile(file, "", 0));
 }
 
 // This test ensures that a cross-domain download correctly sets the referrer
 // according to the referrer policy.
 IN_PROC_BROWSER_TEST_F(DownloadTest, DownloadCrossDomainReferrerPolicy) {
-  host_resolver()->AddRule("www.a.com", "127.0.0.1");
   embedded_test_server()->RegisterRequestHandler(
       base::Bind(&ServerRedirectRequestHandler));
   embedded_test_server()->RegisterRequestHandler(
       base::Bind(&EchoReferrerRequestHandler));
   embedded_test_server()->ServeFilesFromDirectory(GetTestDataDirectory());
   ASSERT_TRUE(embedded_test_server()->Start());
   EnableFileChooser(true);
   std::vector<DownloadItem*> download_items;
   GetDownloads(browser(), &download_items);
   ASSERT_TRUE(download_items.empty());
@@ skipping 1040 matching lines @@
           browser(), 1,
           content::DownloadTestObserver::ON_DANGEROUS_DOWNLOAD_DENY));
   ui_test_utils::NavigateToURL(browser(), extension_url);
 
   observer->WaitForFinished();
 
   // Download shelf should close.
   EXPECT_FALSE(browser()->window()->IsDownloadShelfVisible());
 }
 #endif  // defined(OS_CHROMEOS)