Add an error page for HTTP 404 error pages without bodies.

extensions/browser/api/runtime/runtime_apitest.cc

 // Copyright 2014 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/apps/app_browsertest_util.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_function_test_utils.h"
 #include "chrome/browser/extensions/test_extension_dir.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/notification_service.h"
 #include "extensions/browser/api/runtime/runtime_api.h"
 #include "extensions/browser/extension_dialog_auto_confirm.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/test/result_catcher.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 
 // Tests the privileged components of chrome.runtime.
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ChromeRuntimePrivileged) {
   ASSERT_TRUE(RunExtensionTest("runtime/privileged")) << message_;
 }
 
 // Tests the unprivileged components of chrome.runtime.
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ChromeRuntimeUnprivileged) {
   ASSERT_TRUE(StartEmbeddedTestServer());
   ASSERT_TRUE(
       LoadExtension(test_data_dir_.AppendASCII("runtime/content_script")));
 
-  // The content script runs on webpage.html.
+  // The content script runs on this page.
   extensions::ResultCatcher catcher;
   ui_test_utils::NavigateToURL(browser(),
-                               embedded_test_server()->GetURL("/webpage.html"));
+                               embedded_test_server()->GetURL("/title1.html"));
   EXPECT_TRUE(catcher.GetNextResult()) << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ChromeRuntimeUninstallURL) {
   // Auto-confirm the uninstall dialog.
   extensions::ScopedTestDialogAutoConfirm auto_confirm(
       extensions::ScopedTestDialogAutoConfirm::ACCEPT);
   ASSERT_TRUE(LoadExtension(test_data_dir_.AppendASCII("runtime")
                                 .AppendASCII("uninstall_url")
                                 .AppendASCII("sets_uninstall_url")));
@@ skipping 80 matching lines @@
     } else {
       load_observer.Wait();
       WaitForExtensionViewsToLoad();
     }
   }
   ASSERT_TRUE(
       registry->GetExtensionById(extension_id, ExtensionRegistry::TERMINATED));
 }
 
 }  // namespace extensions