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

chrome/browser/extensions/api/webrtc_from_web_accessible_resource_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 "base/command_line.h"
 #include "base/macros.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/permissions/permission_request_manager.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/ui_test_utils.h"
@@ skipping 42 matching lines @@
   WebRtcFromWebAccessibleResourceTest() {}
   ~WebRtcFromWebAccessibleResourceTest() override {}
 
   // InProcessBrowserTest:
   void SetUpCommandLine(base::CommandLine* command_line) override {
     ExtensionApiTest::SetUpCommandLine(command_line);
 
     command_line->AppendSwitch(switches::kUseFakeDeviceForMediaStream);
   }
 
+  void SetUpOnMainThread() override {
+    ExtensionApiTest::SetUpOnMainThread();
+    host_resolver()->AddRule("a.com", "127.0.0.1");
+  }
+
  protected:
   GURL GetTestServerInsecureUrl(const std::string& path) {
     GURL url = embedded_test_server()->GetURL(path);
 
     GURL::Replacements replace_host_and_scheme;
     replace_host_and_scheme.SetHostStr("a.com");
     replace_host_and_scheme.SetSchemeStr("http");
     url = url.ReplaceComponents(replace_host_and_scheme);
 
     return url;
   }
 
   void LoadTestExtension() {
     ASSERT_TRUE(LoadExtension(test_data_dir_.AppendASCII(
         "webrtc_from_web_accessible_resource")));
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebRtcFromWebAccessibleResourceTest);
 };
 
 // Verify that a chrome-extension:// web accessible URL can successfully access
 // getUserMedia(), even if it is embedded in an insecure context.
 IN_PROC_BROWSER_TEST_F(WebRtcFromWebAccessibleResourceTest,
                        GetUserMediaInWebAccessibleResourceSuccess) {
-  host_resolver()->AddRule("a.com", "127.0.0.1");
   ASSERT_TRUE(StartEmbeddedTestServer());
 
   LoadTestExtension();
   GURL url = GetTestServerInsecureUrl("/extensions/test_file.html?succeed");
   content::WebContents* web_contents =
       browser()->tab_strip_model()->GetActiveWebContents();
   PermissionRequestManager* request_manager =
       PermissionRequestManager::FromWebContents(web_contents);
   request_manager->set_auto_response_for_test(
       PermissionRequestManager::ACCEPT_ALL);
   PermissionRequestObserver permission_request_observer(web_contents);
   extensions::ResultCatcher catcher;
   ui_test_utils::NavigateToURL(browser(), url);
 
   ASSERT_TRUE(catcher.GetNextResult());
   EXPECT_TRUE(permission_request_observer.request_shown());
 }
 
 // Verify that a chrome-extension:// web accessible URL will fail to access
 // getUserMedia() if it is denied by the permission request, even if it is
 // embedded in an insecure context.
 IN_PROC_BROWSER_TEST_F(WebRtcFromWebAccessibleResourceTest,
                        GetUserMediaInWebAccessibleResourceFail) {
-  host_resolver()->AddRule("a.com", "127.0.0.1");
   ASSERT_TRUE(StartEmbeddedTestServer());
 
   LoadTestExtension();
   GURL url = GetTestServerInsecureUrl("/extensions/test_file.html?fail");
   content::WebContents* web_contents =
       browser()->tab_strip_model()->GetActiveWebContents();
   PermissionRequestManager* request_manager =
       PermissionRequestManager::FromWebContents(web_contents);
   request_manager->set_auto_response_for_test(
       PermissionRequestManager::DENY_ALL);
   PermissionRequestObserver permission_request_observer(web_contents);
   extensions::ResultCatcher catcher;
   ui_test_utils::NavigateToURL(browser(), url);
 
   ASSERT_TRUE(catcher.GetNextResult());
   EXPECT_TRUE(permission_request_observer.request_shown());
 }
 
 }  // namespace extensions