Pass through the CONVERT/NONCONVERT/HANKAKU_ZENKAKU keys.

chrome/browser/chromeos/input_method/input_method_manager_impl.cc

 // 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.
 
 #include "chrome/browser/chromeos/input_method/input_method_manager_impl.h"
 
 #include <algorithm>  // std::find
 
 #include <sstream>
 
@@ skipping 723 matching lines @@
     if (Contains(active_input_method_ids, id))
       ids.push_back(id);
   }
   if (ids.empty()) {
     // No input method for the accelerator is active. For example, we should
     // just ignore VKEY_HANGUL when mozc-hangul is not active.
     return false;
   }
 
   SwitchToNextInputMethodInternal(ids, current_input_method.id());
-  return true;  // consume the accelerator.
+
+  // Consume if the triggering accelerator key may have a side-effect(unexpected
+  // character insertion or unexpected accelerator triggering). Here all
+  // incoming key code is only CONVERT/NONCONVERT/HANKAKU_ZENKAKU keys. Thus no
+  // need to consume keys since none of them have side-effect.
+  return false;

[Shu Chen, 2014/12/08 14:55:07]

you may need to rebase this cl.

[Seigo Nonaka, 2014/12/09 09:27:32]

Oh... the HEAD is quite different...

 }
 
 void InputMethodManagerImpl::StateImpl::SwitchToNextInputMethodInternal(
     const std::vector<std::string>& input_method_ids,
     const std::string& current_input_methodid) {
   std::vector<std::string>::const_iterator iter = std::find(
       input_method_ids.begin(), input_method_ids.end(), current_input_methodid);
   if (iter != input_method_ids.end())
     ++iter;
   if (iter == input_method_ids.end())
@@ skipping 400 matching lines @@
   if (candidate_window_controller_.get())
     return;
 
   candidate_window_controller_.reset(
       CandidateWindowController::CreateCandidateWindowController());
   candidate_window_controller_->AddObserver(this);
 }
 
 }  // namespace input_method
 }  // namespace chromeos