Adds experimental flag --enable-experimental-ime-features.

chromeos/ime/component_extension_ime_manager.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 "chromeos/ime/component_extension_ime_manager.h"
 
+#include "base/command_line.h"
 #include "base/logging.h"
 #include "base/strings/string_util.h"
+#include "chromeos/chromeos_switches.h"
 #include "chromeos/ime/extension_ime_util.h"
 
 namespace chromeos {
 
 namespace {
 
 // The whitelist for enabling extension based xkb keyboards at login session.
 const char* kLoginLayoutWhitelist[] = {
   "be",
   "br",
@@ skipping 115 matching lines @@
 }
 
 bool ComponentExtensionIMEManager::IsWhitelistedExtension(
     const std::string& extension_id) {
   return component_extension_imes_.find(extension_id) !=
          component_extension_imes_.end();
 }
 
 input_method::InputMethodDescriptors
     ComponentExtensionIMEManager::GetAllIMEAsInputMethodDescriptor() {
+  bool enable_new_korean_ime = CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableNewKoreanIme);
   input_method::InputMethodDescriptors result;
   for (std::map<std::string, ComponentExtensionIME>::const_iterator it =
           component_extension_imes_.begin();
        it != component_extension_imes_.end(); ++it) {
     const ComponentExtensionIME& ext = it->second;
     for (size_t j = 0; j < ext.engines.size(); ++j) {
       const ComponentExtensionEngine& ime = ext.engines[j];
+      // Filter out new Korean IME if the experimental flag is OFF.
+      if (!enable_new_korean_ime && ime.engine_id == "ko-t-i0-und")
+        continue;
       const std::string input_method_id =
           extension_ime_util::GetComponentInputMethodID(
               ext.id, ime.engine_id);
       const std::vector<std::string>& layouts = ime.layouts;
       result.push_back(
           input_method::InputMethodDescriptor(
               input_method_id,
               ime.display_name,
               ime.indicator,
               layouts,
@@ skipping 41 matching lines @@
 bool ComponentExtensionIMEManager::IsInLoginLayoutWhitelist(
     const std::vector<std::string>& layouts) {
   for (size_t i = 0; i < layouts.size(); ++i) {
     if (login_layout_set_.find(layouts[i]) != login_layout_set_.end())
       return true;
   }
   return false;
 }
 
 }  // namespace chromeos