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..2f4b63febaf8572d3ec8f448e260134a923e57f6 100644
--- a/chromeos/ime/component_extension_ime_manager.cc
+++ b/chromeos/ime/component_extension_ime_manager.cc
@@ -7,6 +7,7 @@
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "chromeos/ime/extension_ime_util.h"
+#include "chromeos/ime/input_method_manager.h"
 
 namespace chromeos {
 
@@ -148,6 +149,12 @@ 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 (!input_method::InputMethodManager::
+          IsExperimentalImeFeaturesEnabled() &&
+          ime.engine_id == "ko-t-i0-und") {
+        continue;
+      }
       const std::string input_method_id =
           extension_ime_util::GetComponentInputMethodID(
               ext.id, ime.engine_id);