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

chrome/browser/chromeos/input_method/mock_input_method_manager.cc

Index: chrome/browser/chromeos/input_method/mock_input_method_manager.cc
diff --git a/chrome/browser/chromeos/input_method/mock_input_method_manager.cc b/chrome/browser/chromeos/input_method/mock_input_method_manager.cc
index 4aeef61b214127026f317621644988d5a4a1aa86..a61f83022f962b610f1521f5a9de3df2d14614ae 100644
--- a/chrome/browser/chromeos/input_method/mock_input_method_manager.cc
+++ b/chrome/browser/chromeos/input_method/mock_input_method_manager.cc
@@ -142,6 +142,7 @@ InputMethodDescriptor MockInputMethodManager::GetCurrentInputMethod() const {
                                  descriptor.name(),
                                  descriptor.keyboard_layouts(),
                                  descriptor.language_codes(),
+                                 true,
                                  GURL());  // options page url.
   }
   return descriptor;
@@ -174,7 +175,7 @@ void MockInputMethodManager::set_hardware_keyboard_layout(
   delegate_.set_hardware_keyboard_layout(value);
 }
 
-bool MockInputMethodManager::IsFullLatinKeyboard(
+bool MockInputMethodManager::IsLoginKeyboard(
     const std::string& layout) const {
   return true;
 }