IME for Mus: Use ui::InputMethodChromeOS to provide logic for ime driver.

ui/base/ime/input_method_chromeos.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_BASE_IME_INPUT_METHOD_CHROMEOS_H_
 #define UI_BASE_IME_INPUT_METHOD_CHROMEOS_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <set>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "ui/base/ime/chromeos/character_composer.h"
 #include "ui/base/ime/composition_text.h"
 #include "ui/base/ime/ime_input_context_handler_interface.h"
 #include "ui/base/ime/input_method_base.h"
 
 namespace ui {
 
 // A ui::InputMethod implementation based on IBus.
 class UI_BASE_IME_EXPORT InputMethodChromeOS : public InputMethodBase {
  public:
   explicit InputMethodChromeOS(internal::InputMethodDelegate* delegate);
   ~InputMethodChromeOS() override;
 
+  using AckCallback = base::Callback<void(bool)>;
+  void DispatchKeyEvent(ui::KeyEvent* event,
+                        std::unique_ptr<AckCallback> ack_callback);
+
   // Overridden from InputMethod:
   bool OnUntranslatedIMEMessage(const base::NativeEvent& event,
                                 NativeEventResult* result) override;
   void DispatchKeyEvent(ui::KeyEvent* event) override;
   void OnTextInputTypeChanged(const TextInputClient* client) override;
   void OnCaretBoundsChanged(const TextInputClient* client) override;
   void CancelComposition(const TextInputClient* client) override;
   bool IsCandidatePopupOpen() const override;
 
  protected:
@@ skipping 53 matching lines @@
   void CommitText(const std::string& text) override;
   void UpdateCompositionText(const CompositionText& text,
                              uint32_t cursor_pos,
                              bool visible) override;
   void DeleteSurroundingText(int32_t offset, uint32_t length) override;
 
   // Hides the composition text.
   void HidePreeditText();
 
   // Callback function for IMEEngineHandlerInterface::ProcessKeyEvent.
-  void ProcessKeyEventDone(ui::KeyEvent* event, bool is_handled);
+  void ProcessKeyEventDone(ui::KeyEvent* event,
+                           std::unique_ptr<AckCallback> ack_callback,
+                           bool is_handled);
 
   // Returns whether an non-password input field is focused.
   bool IsNonPasswordInputFieldFocused();
 
   // Returns true if an text input field is focused.
   bool IsInputFieldFocused();
 
   // Pending composition text generated by the current pending key event.
   // It'll be sent to the focused text input client as soon as we receive the
   // processing result of the pending key event.
@@ skipping 23 matching lines @@
 
   // Used for making callbacks.
   base::WeakPtrFactory<InputMethodChromeOS> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodChromeOS);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IME_INPUT_METHOD_CHROMEOS_H_