Properly set ShelfAlignment during login

ash/test/ash_test_base.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 ASH_TEST_ASH_TEST_BASE_H_
 #define ASH_TEST_ASH_TEST_BASE_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 99 matching lines @@
   AshTestHelper* ash_test_helper() { return ash_test_helper_.get(); }
 
   void RunAllPendingInMessageLoop();
 
   TestScreenshotDelegate* GetScreenshotDelegate();
   TestSystemTrayDelegate* GetSystemTrayDelegate();
 
   // Utility methods to emulate user logged in or not, session started or not
   // and user able to lock screen or not cases.
   void SetSessionStarted(bool session_started);
+  void SetSessionStarting();

[James Cook, 2015/02/17 20:03:36]

Please document how this relates to SetSessionStarted().

   void SetUserLoggedIn(bool user_logged_in);
   void SetCanLockScreen(bool can_lock_screen);
   void SetShouldLockScreenBeforeSuspending(bool should_lock);
   void SetUserAddingScreenRunning(bool user_adding_screen_running);
 
   // Methods to emulate blocking and unblocking user session with given
   // |block_reason|.
   void BlockUserSession(UserSessionBlockReason block_reason);
   void UnblockUserSession();
 
@@ skipping 24 matching lines @@
   ~NoSessionAshTestBase() override {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NoSessionAshTestBase);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_ASH_TEST_BASE_H_