Add a full screen virtual keyboard to virtual keyboard root window

ash/root_window_controller_unittest.cc

Index: ash/root_window_controller_unittest.cc
diff --git a/ash/root_window_controller_unittest.cc b/ash/root_window_controller_unittest.cc
index b8c480c6ff0221297ce005ee40a59228d970c344..2fd939b0208f1e6da555afeef1ecabf443e881e8 100644
--- a/ash/root_window_controller_unittest.cc
+++ b/ash/root_window_controller_unittest.cc
@@ -696,8 +696,8 @@ TEST_F(VirtualKeyboardRootWindowControllerTest,
   // Track the keyboard container window.
   aura::WindowTracker tracker;
   tracker.Add(keyboard_container);
-  // Mock a login state change to reinitialize the keyboard.
-  ash::Shell::GetInstance()->OnLoginStateChanged(user::LOGGED_IN_OWNER);
+  // Mock a login user profile change to reinitialize the keyboard.

[bshe, 2013/10/31 16:45:44]

This OnLoginUserProfilePrepared is normally called after receiving
chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED notification. Here I just
called it directly in this test. Not sure how ash unit test mock the
notification or maybe I should move this unittest to a browser test? Or this is
fine?

[oshima, 2013/11/01 00:09:02]

I'm not sure. I'll investigate and get back to you.

+  ash::Shell::GetInstance()->OnLoginUserProfilePrepared();
   // keyboard_container should no longer be present.
   EXPECT_FALSE(tracker.Contains(keyboard_container));
 }