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

chrome/browser/extensions/extension_dom_clipboard_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 "base/strings/stringprintf.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/test/browser_test_utils.h"
 #include "net/dns/mock_host_resolver.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "url/gurl.h"
 
 namespace {
 
 class ClipboardApiTest : public ExtensionApiTest {
  public:
+  void SetUpOnMainThread() override {
+    ExtensionApiTest::SetUpOnMainThread();
+    host_resolver()->AddRule("*", "127.0.0.1");
+  }
+
   bool LoadHostedApp(const std::string& app_name,
                      const std::string& launch_page);
   bool ExecuteCopyInSelectedTab();
   bool ExecutePasteInSelectedTab();
   bool ExecuteCommandInIframeInSelectedTab(const char* command);
 
  private:
   bool ExecuteScriptInSelectedTab(const std::string& script);
 };
 
 bool ClipboardApiTest::LoadHostedApp(const std::string& app_name,
                                      const std::string& launch_page) {
-  host_resolver()->AddRule("*", "127.0.0.1");
-
   if (!StartEmbeddedTestServer()) {
     message_ = "Failed to start test server.";
     return false;
   }
 
   if (!LoadExtension(test_data_dir_.AppendASCII("clipboard")
                                    .AppendASCII(app_name))) {
     message_ = "Failed to load hosted app.";
     return false;
   }
@@ skipping 70 matching lines @@
 
   // TODO(dcheng): The test coverage here is incomplete. The content test utils
   // for executing script force a user gesture, so it's impossible to test
   // the no user gesture case without a lot of code duplication.
   EXPECT_TRUE(ExecuteCopyInSelectedTab()) << message_;
   EXPECT_FALSE(ExecutePasteInSelectedTab()) << message_;
   EXPECT_TRUE(ExecuteCommandInIframeInSelectedTab("copy")) << message_;
   EXPECT_FALSE(ExecuteCommandInIframeInSelectedTab("paste")) << message_;
 }