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

chromeos/ime/component_extension_ime_manager.cc

Index: chromeos/ime/component_extension_ime_manager.cc
diff --git a/chromeos/ime/component_extension_ime_manager.cc b/chromeos/ime/component_extension_ime_manager.cc
index a83c6c48ecb4e86de84f58eda1acee32eac43366..9a8cce1d507a40ef551b64019c6a6b3a6a0ea995 100644
--- a/chromeos/ime/component_extension_ime_manager.cc
+++ b/chromeos/ime/component_extension_ime_manager.cc
@@ -4,8 +4,10 @@
 
 #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 {
@@ -141,6 +143,8 @@ bool ComponentExtensionIMEManager::IsWhitelistedExtension(
 
 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();
@@ -148,6 +152,9 @@ input_method::InputMethodDescriptors
     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);