Refactors keyboard related code so mash can use a keyboard

ui/keyboard/keyboard_controller.h

Index: ui/keyboard/keyboard_controller.h
diff --git a/ui/keyboard/keyboard_controller.h b/ui/keyboard/keyboard_controller.h
index ecd991d265f388321bae59d51b36cf177abdf67c..09d0a2177bf0fe28c5d0b5f8771e285838751369 100644
--- a/ui/keyboard/keyboard_controller.h
+++ b/ui/keyboard/keyboard_controller.h
@@ -65,9 +65,7 @@ class KEYBOARD_EXPORT KeyboardController : public ui::InputMethodObserver,
   aura::Window* GetContainerWindow();
 
   // Whether the container window for the keyboard has been initialized.
-  bool keyboard_container_initialized() const {
-    return container_.get() != NULL;
-  }
+  bool keyboard_container_initialized() const { return container_; }
 
   // Reloads the content of the keyboard. No-op if the keyboard content is not
   // loaded yet.