Remove candidate show/hide/update related code

ui/base/ime/input_method_win.cc

Index: ui/base/ime/input_method_win.cc
diff --git a/ui/base/ime/input_method_win.cc b/ui/base/ime/input_method_win.cc
index 9bea264937c2a4dfc84b06741e472f3fe4aa7b31..29413f58e8c3f55d00fcce7f3d2eec582450e326 100644
--- a/ui/base/ime/input_method_win.cc
+++ b/ui/base/ime/input_method_win.cc
@@ -366,25 +366,13 @@ LRESULT InputMethodWin::OnImeNotify(UINT message,
 
   *handled = FALSE;
 
-  bool previous_state = is_candidate_popup_open_;
-
   // Update |is_candidate_popup_open_|, whether a candidate window is open.
   switch (wparam) {
   case IMN_OPENCANDIDATE:
     is_candidate_popup_open_ = true;
-    if (!previous_state)
-      OnCandidateWindowShown();
     break;
   case IMN_CLOSECANDIDATE:
     is_candidate_popup_open_ = false;
-    if (previous_state)
-      OnCandidateWindowHidden();
-    break;
-  case IMN_CHANGECANDIDATE:
-    // TODO(kochi): The IME API expects this event to notify window size change,
-    // while this may fire more often without window resize. There is no generic
-    // way to get bounds of candidate window.
-    OnCandidateWindowUpdated();
     break;
   }