Introduce --cancel-first-run and reduce the strength of --no-first-run.

chrome/browser/chromeos/login/login_browsertest.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 "ash/shell.h"
 #include "base/command_line.h"
 #include "chrome/browser/chrome_browser_main.h"
 #include "chrome/browser/chrome_browser_main_extra_parts.h"
 #include "chrome/browser/chrome_content_browser_client.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 47 matching lines @@
 class LoginUserTest : public LoginTestBase {
  protected:
   virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
     LoginTestBase::SetUpInProcessBrowserTestFixture();
   }
 
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
     command_line->AppendSwitchASCII(
         chromeos::switches::kLoginUser, "TestUser@gmail.com");
     command_line->AppendSwitchASCII(chromeos::switches::kLoginProfile, "user");
-    command_line->AppendSwitch(::switches::kNoFirstRun);
   }
 };
 
 class LoginGuestTest : public LoginTestBase {
  protected:
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
     command_line->AppendSwitch(chromeos::switches::kGuestSession);
     command_line->AppendSwitch(::switches::kIncognito);
     command_line->AppendSwitchASCII(chromeos::switches::kLoginProfile, "user");
-    command_line->AppendSwitch(::switches::kNoFirstRun);
   }
 };
 
 class LoginCursorTest : public LoginTestBase {
  protected:
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
     command_line->AppendSwitch(chromeos::switches::kLoginManager);
   }
 };
 
@@ skipping 117 matching lines @@
 // Verifies that the webui for login comes up successfully.
 IN_PROC_BROWSER_TEST_F(LoginSigninTest, WebUIVisible) {
   scoped_refptr<content::MessageLoopRunner> runner =
       new content::MessageLoopRunner;
   content_browser_client_->browser_main_extra_parts_->set_quit_task(
       runner->QuitClosure());
   runner->Run();
 }
 
 }  // namespace