End to end test: async focus shouldn't trigger virtual keyboard.

ui/keyboard/keyboard_controller.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_KEYBOARD_KEYBOARD_CONTROLLER_H_
 #define UI_KEYBOARD_KEYBOARD_CONTROLLER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 160 matching lines @@
   // aura::WindowObserver overrides
   void OnWindowHierarchyChanged(const HierarchyChangeParams& params) override;
   void OnWindowAddedToRootWindow(aura::Window* window) override;
   void OnWindowRemovingFromRootWindow(aura::Window* window,
                                       aura::Window* new_root) override;
   void OnWindowBoundsChanged(aura::Window* window,
                              const gfx::Rect& old_bounds,
                              const gfx::Rect& new_bounds) override;
 
   // InputMethodObserver overrides
+  void OnFocus() override {}
   void OnBlur() override {}
   void OnCaretBoundsChanged(const ui::TextInputClient* client) override {}
   void OnFocus() override {}
   void OnInputMethodDestroyed(const ui::InputMethod* input_method) override {}
   void OnTextInputStateChanged(const ui::TextInputClient* client) override;
   void OnShowImeIfNeeded() override;
 
   // Notifies that the extension has completed loading
   void NotifyKeyboardLoadingComplete();
 
@@ skipping 43 matching lines @@
   static KeyboardController* instance_;
 
   base::WeakPtrFactory<KeyboardController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyboardController);
 };
 
 }  // namespace keyboard
 
 #endif  // UI_KEYBOARD_KEYBOARD_CONTROLLER_H_