Makes MaterialDesignController initialization explicit

chrome/app/resources/resources_unittest.cc

 // Copyright 2015 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 <string>
 
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
 
 #include "chrome/grit/chromium_strings.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #include "ui/base/l10n/l10n_util.h"
+#include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_paths.h"
 
 class ResourcesTest : public ::testing::Test {
  protected:
   ResourcesTest() {
     ui::RegisterPathProvider();
+    ui::MaterialDesignController::Initialize();
     ResourceBundle::InitSharedInstanceWithLocale(
         "en-US", nullptr, ResourceBundle::LOAD_COMMON_RESOURCES);
   }
 
   ~ResourcesTest() override { ResourceBundle::CleanupSharedInstance(); }
 };
 
 // Trailing whitespace has been the cause of a bug in the past. Make sure this
 // never happens again on messages where this matter.
 TEST_F(ResourcesTest, CriticalMessagesContainNoExtraWhitespaces) {
@@ skipping 13 matching lines @@
     ResourceBundle::GetSharedInstance().OverrideLocalePakForTest(
         locale_file_path);
     ResourceBundle::GetSharedInstance().ReloadLocaleResources("");
 
     for (int message : messages_to_check) {
       base::string16 message_str = l10n_util::GetStringUTF16(message);
       EXPECT_EQ(message_str, base::TrimWhitespace(message_str, base::TRIM_ALL));
     }
   }
 }