Enable tests in TrayIMETest for MD

ash/common/system/chromeos/ime_menu/ime_menu_tray_unittest.cc

 // Copyright 2016 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 "ash/common/system/chromeos/ime_menu/ime_menu_tray.h"
 
 #include "ash/common/accelerators/accelerator_controller.h"
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/system/chromeos/ime_menu/ime_list_view.h"
 #include "ash/common/system/status_area_widget.h"
@@ skipping 34 matching lines @@
 
   // Returns true if the background color of the tray is active.
   bool IsTrayBackgroundActive() { return GetTray()->is_active(); }
 
   // Returns true if the IME menu bubble has been shown.
   bool IsBubbleShown() { return GetTray()->IsImeMenuBubbleShown(); }
 
   // Returns true if the IME menu list has been updated with the right IME list.
   bool IsTrayImeListValid(const std::vector<IMEInfo>& expected_imes,
                           const IMEInfo& expected_current_ime) {
-    std::map<views::View*, std::string> ime_map =
-        GetTray()->ime_list_view_->ime_map_;
+    const std::map<views::View*, std::string>& ime_map =
+        ImeListViewTestApi(GetTray()->ime_list_view_).ime_map();
     if (ime_map.size() != expected_imes.size())
       return false;
 
     std::vector<std::string> expected_ime_ids;
     for (const auto& ime : expected_imes) {
       expected_ime_ids.push_back(ime.id);
     }
     for (const auto& ime : ime_map) {
       // Tests that all the IMEs on the view is in the list of selected IMEs.
       if (std::find(expected_ime_ids.begin(), expected_ime_ids.end(),
@@ skipping 237 matching lines @@
   input_method_manager = chromeos::input_method::InputMethodManager::Get();
   EXPECT_TRUE(input_method_manager &&
               input_method_manager->IsEmojiHandwritingVoiceOnImeMenuEnabled());
   EXPECT_TRUE(GetTray()->ShouldShowEmojiHandwritingVoiceButtons());
 
   FocusInInputContext(ui::TEXT_INPUT_TYPE_PASSWORD);
   EXPECT_FALSE(GetTray()->ShouldShowEmojiHandwritingVoiceButtons());
 }
 
 }  // namespace ash