Remove the 2-level input method system & InputMethodBridge.

ui/views/ime/null_input_method.h

-// Copyright 2014 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_VIEWS_IME_NULL_INPUT_METHOD_H_
-#define UI_VIEWS_IME_NULL_INPUT_METHOD_H_
-
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "ui/views/ime/input_method.h"
-
-namespace views {
-
-// An implementation of views::InputMethod which does nothing.
-//
-// We're working on removing views::InputMethod{,Base,Bridge} and going to use
-// only ui::InputMethod.  Use this class instead of views::InputMethodBridge
-// with ui::TextInputFocusManager to effectively eliminate the
-// views::InputMethod layer.
-class NullInputMethod : public InputMethod {
- public:
-  NullInputMethod();
-
-  // Overridden from InputMethod:
-  void SetDelegate(internal::InputMethodDelegate* delegate) override;
-  void Init(Widget* widget) override;
-  void OnFocus() override;
-  void OnBlur() override;
-  bool OnUntranslatedIMEMessage(const base::NativeEvent& event,
-                                NativeEventResult* result) override;
-  void DispatchKeyEvent(const ui::KeyEvent& key) override;
-  void OnTextInputTypeChanged(View* view) override;
-  void OnCaretBoundsChanged(View* view) override;
-  void CancelComposition(View* view) override;
-  void OnInputLocaleChanged() override;
-  std::string GetInputLocale() override;
-  bool IsActive() override;
-  ui::TextInputClient* GetTextInputClient() const override;
-  ui::TextInputType GetTextInputType() const override;
-  bool IsCandidatePopupOpen() const override;
-  void ShowImeIfNeeded() override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(NullInputMethod);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_IME_NULL_INPUT_METHOD_H_