Let pyauto create an attached webdriver instance to manipulate web pages.

chrome/test/ui/named_interface_uitest.cc

 // Copyright (c) 2011 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/test/ui/ui_test.h"
 
 #include "chrome/common/url_constants.h"
 #include "chrome/test/automation/automation_proxy.h"
 #include "chrome/test/automation/proxy_launcher.h"
 #include "chrome/test/test_switches.h"
 
 // The named testing interface enables the use of a named socket for controlling
 // the browser. This eliminates the dependency that the browser must be forked
 // from the controlling process.
 namespace {
 
 class NamedInterfaceTest : public UITest {
  public:
   NamedInterfaceTest() {
     show_window_ = true;
   }
 
   virtual ProxyLauncher *CreateProxyLauncher() {
     CommandLine::StringType channel_path =
         CommandLine::ForCurrentProcess()->GetSwitchValueNative(
             switches::kTestingChannel);
     if (channel_path.empty())
       channel_path = ProxyLauncher::kDefaultInterfacePath;
 
-    return new NamedProxyLauncher(channel_path, true, true);
+    NamedProxyLauncher::InitParams params;
+    params.launch_browser = true;
+    params.disconnect_on_failure = true;
+    params.wait_for_server_channel = true;
+    return new NamedProxyLauncher(channel_path, params);
   }
 };
 
 // Basic sanity test for named testing interface which
 // launches a browser instance that uses a named socket, then
 // sends it some commands to open some tabs over that socket.
 TEST_F(NamedInterfaceTest, BasicNamedInterface) {
   scoped_refptr<BrowserProxy> browser_proxy(
       automation()->GetBrowserWindow(0));
   ASSERT_TRUE(browser_proxy.get());
 
   for (int i = 0; i < 10; ++i)
     ASSERT_TRUE(browser_proxy->AppendTab(GURL(chrome::kAboutBlankURL)));
 }
 
 // TODO(dtu): crosbug.com/8514: Write a test that makes sure you can disconnect,
 //            then reconnect with a new connection and continue automation.
 
 }  // namespace