Add a full screen virtual keyboard to virtual keyboard root window

ash/display/display_controller.cc

Index: ash/display/display_controller.cc
diff --git a/ash/display/display_controller.cc b/ash/display/display_controller.cc
index 8a0b6b97457a7b1f13614776ca83c1dcb9a120f7..9280c52686ad519fa29da91a60d8360ab6a23cc2 100644
--- a/ash/display/display_controller.cc
+++ b/ash/display/display_controller.cc
@@ -339,6 +339,11 @@ void DisplayController::CloseChildWindows() {
       }
     }
   }
+  if (virtual_keyboard_window_controller_ &&
+      virtual_keyboard_window_controller_->root_window_controller()) {
+    virtual_keyboard_window_controller_->root_window_controller()->
+        CloseChildWindows();
+  }

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

can you call 

CloseNonDesktopDisplay()

at the end of Shutdown instead?

[bshe, 2013/11/12 15:28:33]

This close child window currently depends on event_client_ (not sure if this is
expected). CloseNonDesktopDisplay is called after event_client_ is deleted in
the shutdown code path (dctor of Shell). So I called close child windows here.

On 2013/11/01 00:09:02, oshima wrote:

[oshima, 2013/11/13 21:22:49]

Let me look into this dependency.

[oshima, 2013/11/13 22:23:37]

What kind of problem you have seen? I just tried and saw no issue.

[bshe, 2013/11/14 00:11:29]

Talked on hangout. I misunderstood you, sorry.
Changed to your suggestion.

On 2013/11/13 22:23:37, oshima wrote:

 }
 
 std::vector<aura::RootWindow*> DisplayController::GetAllRootWindows() {