Remove candidate show/hide/update related code

ui/views/controls/prefix_selector.cc

 // Copyright 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.
 
 #include "ui/views/controls/prefix_selector.h"
 
 #include "base/i18n/case_conversion.h"
 #include "ui/base/ime/text_input_type.h"
 #include "ui/gfx/range/range.h"
 #include "ui/views/controls/prefix_delegate.h"
@@ skipping 120 matching lines @@
     base::i18n::TextDirection direction) {
   return true;
 }
 
 void PrefixSelector::ExtendSelectionAndDelete(size_t before, size_t after) {
 }
 
 void PrefixSelector::EnsureCaretInRect(const gfx::Rect& rect) {
 }
 
-void PrefixSelector::OnCandidateWindowShown() {
-}
-
-void PrefixSelector::OnCandidateWindowUpdated() {
-}
-
-void PrefixSelector::OnCandidateWindowHidden() {
-}
-
 bool PrefixSelector::IsEditCommandEnabled(int command_id) {
   return false;
 }
 
 void PrefixSelector::SetEditCommandForNextKeyEvent(int command_id) {
 }
 
 void PrefixSelector::OnTextInput(const base::string16& text) {
   // Small hack to filter out 'tab' and 'enter' input, as the expectation is
   // that they are control characters and will not affect the currently-active
@@ skipping 39 matching lines @@
   return (model_text.size() >= lower_text.size()) &&
       (model_text.compare(0, lower_text.size(), lower_text) == 0);
 }
 
 void PrefixSelector::ClearText() {
   current_text_.clear();
   time_of_last_key_ = base::TimeTicks();
 }
 
 }  // namespace views