Disable non Latin keyboard layout on Lock screen and Sign-in screen.

chrome/browser/chromeos/input_method/input_method_manager_impl.cc

Index: chrome/browser/chromeos/input_method/input_method_manager_impl.cc
diff --git a/chrome/browser/chromeos/input_method/input_method_manager_impl.cc b/chrome/browser/chromeos/input_method/input_method_manager_impl.cc
index 5a41b15ef0156f77d7599952704fe86993c176f9..ec5aefc4e9b8df29579d5f1e27b94016dfcc9a4e 100644
--- a/chrome/browser/chromeos/input_method/input_method_manager_impl.cc
+++ b/chrome/browser/chromeos/input_method/input_method_manager_impl.cc
@@ -115,10 +115,11 @@ const struct MigrationHangulKeyboardToInputMethodID {
 
 }  // namespace
 
-bool InputMethodManagerImpl::IsFullLatinKeyboard(
+bool InputMethodManagerImpl::IsLoginKeyboard(
     const std::string& layout) const {
-  const std::string& lang = util_.GetLanguageCodeFromInputMethodId(layout);
-  return full_latin_keyboard_checker.IsFullLatinKeyboard(layout, lang);
+  const InputMethodDescriptor* ime =
+      util_.GetInputMethodDescriptorFromId(layout);
+  return ime ? ime->is_login_keyboard() : false;
 }
 
 InputMethodManagerImpl::InputMethodManagerImpl(
@@ -246,7 +247,7 @@ void InputMethodManagerImpl::EnableLayouts(const std::string& language_code,
   // layouts, so it appears first on the list of active input
   // methods at the input language status menu.
   if (util_.IsValidInputMethodId(initial_layout) &&
-      InputMethodUtil::IsKeyboardLayout(initial_layout)) {
+      IsLoginKeyboard(initial_layout)) {
     layouts.push_back(initial_layout);
   } else if (!initial_layout.empty()) {
     DVLOG(1) << "EnableLayouts: ignoring non-keyboard or invalid ID: "
@@ -258,7 +259,7 @@ void InputMethodManagerImpl::EnableLayouts(const std::string& language_code,
     const std::string& candidate = candidates[i];
     // Not efficient, but should be fine, as the two vectors are very
     // short (2-5 items).
-    if (!Contains(layouts, candidate))
+    if (!Contains(layouts, candidate) && IsLoginKeyboard(candidate))
       layouts.push_back(candidate);
   }
 
@@ -562,7 +563,7 @@ void InputMethodManagerImpl::AddInputMethodExtension(
   }
 
   extra_input_methods_[id] =
-      InputMethodDescriptor(id, name, layouts, languages, options_url);
+      InputMethodDescriptor(id, name, layouts, languages, false, options_url);
   if (Contains(enabled_extension_imes_, id) &&
       !ComponentExtensionIMEManager::IsComponentExtensionIMEId(id)) {
     if (!Contains(active_input_method_ids_, id)) {
@@ -925,7 +926,7 @@ void InputMethodManagerImpl::OnScreenLocked() {
     const std::string& input_method_id = saved_active_input_method_ids_[i];
     // Skip if it's not a keyboard layout. Drop input methods including
     // extension ones.
-    if (!InputMethodUtil::IsKeyboardLayout(input_method_id))
+    if (!IsLoginKeyboard(input_method_id))
       continue;
     active_input_method_ids_.push_back(input_method_id);
     if (input_method_id == hardware_keyboard_id)