[cros] Use mocked URLFetcher and other mocks in ExistingUserController tests.

chrome/browser/chromeos/login/mock_authenticator.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_MOCK_AUTHENTICATOR_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_MOCK_AUTHENTICATOR_H_
 #pragma once
 
 #include <string>
 
@@ skipping 54 matching lines @@
                          const std::string& login_token,
                          const std::string& login_captcha) OVERRIDE {}
 
  private:
   std::string expected_username_;
   std::string expected_password_;
 
   DISALLOW_COPY_AND_ASSIGN(MockAuthenticator);
 };
 
-class MockLoginUtils : public LoginUtils {
+class TestLoginUtils : public LoginUtils {
  public:
-  MockLoginUtils(const std::string& expected_username,
+  TestLoginUtils(const std::string& expected_username,
                  const std::string& expected_password);
-  virtual ~MockLoginUtils();
+  virtual ~TestLoginUtils();
 
+  virtual void DoBrowserLaunch(Profile* profile,
+                                 LoginDisplayHost* login_host) OVERRIDE {}
   virtual void PrepareProfile(const std::string& username,
                               const std::string& display_email,
                               const std::string& password,
                               bool pending_requests,
                               bool using_oauth,
                               bool has_cookies,
                               Delegate* delegate) OVERRIDE;
 
   virtual void DelegateDeleted(Delegate* delegate) OVERRIDE;
 
@@ skipping 25 matching lines @@
   virtual void TransferDefaultAuthCache(Profile* default_profile,
                                         Profile* new_profile) OVERRIDE;
 
   virtual void StopBackgroundFetchers() OVERRIDE;
 
  private:
   std::string expected_username_;
   std::string expected_password_;
   std::string auth_token_;
 
-  DISALLOW_COPY_AND_ASSIGN(MockLoginUtils);
+  DISALLOW_COPY_AND_ASSIGN(TestLoginUtils);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_MOCK_AUTHENTICATOR_H_