Support reverse conversion for ChromeOS

ui/base/ime/input_method_ibus.h

 // Copyright (c) 2012 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_IBUS_H_
 #define UI_BASE_IME_INPUT_METHOD_IBUS_H_
 
 #include <set>
 #include <string>
 
@@ skipping 170 matching lines @@
   // 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.
   CompositionText composition_;
 
   // Pending result 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.
   string16 result_text_;
 
+  string16 previous_selected_text_;
+
   // Indicates if input context is focused or not.
   bool context_focused_;
 
   // Indicates if there is an ongoing composition text.
   bool composing_text_;
 
   // Indicates if the composition text is changed or deleted.
   bool composition_changed_;
 
   // If it's true then all input method result received before the next key
   // event will be discarded.
   bool suppress_next_result_;
 
   // An object to compose a character from a sequence of key presses
   // including dead key etc.
   CharacterComposer character_composer_;
 
   // Used for making callbacks.
   base::WeakPtrFactory<InputMethodIBus> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InputMethodIBus);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_IME_INPUT_METHOD_IBUS_H_