Add a full screen virtual keyboard to virtual keyboard root window

ash/ash.gyp

Index: ash/ash.gyp
diff --git a/ash/ash.gyp b/ash/ash.gyp
index ce886946ba255cca996440efc951b4ca378a4ace..b46fc0388a1625b88440594dbfd7adf0f5d0b569 100644
--- a/ash/ash.gyp
+++ b/ash/ash.gyp
@@ -148,8 +148,6 @@
         'host/root_window_host_factory.cc',
         'host/root_window_host_factory.h',
         'host/root_window_host_factory_win.cc',
-        'keyboard_controller_proxy_stub.cc',
-        'keyboard_controller_proxy_stub.h',
         'keyboard_overlay/keyboard_overlay_delegate.cc',
         'keyboard_overlay/keyboard_overlay_delegate.h',
         'keyboard_overlay/keyboard_overlay_view.cc',
@@ -637,6 +635,8 @@
       'sources': [
         'shell/toplevel_window.cc',
         'shell/toplevel_window.h',
+        'shell/keyboard_controller_proxy_stub.cc',
+        'shell/keyboard_controller_proxy_stub.h',
         'test/app_list_controller_test_api.cc',
         'test/app_list_controller_test_api.h',
         'test/ash_test_base.cc',
@@ -752,6 +752,7 @@
         'display/display_info_unittest.cc',
         'display/display_manager_unittest.cc',
         'display/mirror_window_controller_unittest.cc',
+        'display/virtual_keyboard_window_controller_unittest.cc',
         'display/mouse_cursor_event_filter_unittest.cc',
         'display/resolution_notification_controller_unittest.cc',
         'display/root_window_transformers_unittest.cc',
@@ -947,6 +948,8 @@
         'shell/context_menu.cc',
         'shell/context_menu.h',
         'shell/example_factory.h',
+        'shell/keyboard_controller_proxy_stub.cc',
+        'shell/keyboard_controller_proxy_stub.h',
         'shell/launcher_delegate_impl.cc',
         'shell/launcher_delegate_impl.h',
         'shell/lock_view.cc',