Fix calculation of usable area of screen when VK is shown.

ash/shell/keyboard_controller_proxy_stub.h

Index: ash/shell/keyboard_controller_proxy_stub.h
diff --git a/ash/shell/keyboard_controller_proxy_stub.h b/ash/shell/keyboard_controller_proxy_stub.h
index f2c03dae5417f328128e80a96d57e30299c0ed74..465aee8cfac3be8ddef83b3ed4324359dc6297ac 100644
--- a/ash/shell/keyboard_controller_proxy_stub.h
+++ b/ash/shell/keyboard_controller_proxy_stub.h
@@ -33,10 +33,9 @@ class KeyboardControllerProxyStub : public keyboard::KeyboardControllerProxy {
   virtual void LoadSystemKeyboard() OVERRIDE;
   virtual void ReloadKeyboardIfNeeded() OVERRIDE;
 
-
   aura::test::TestWindowDelegate delegate_;
   scoped_ptr<aura::Window> keyboard_;
-
+  scoped_ptr<ui::InputMethod> input_method_;
   DISALLOW_COPY_AND_ASSIGN(KeyboardControllerProxyStub);
 };