Makes MaterialDesignController initialization explicit

ui/views/test/views_test_base.cc

 // Copyright (c) 2012 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 "ui/views/test/views_test_base.h"
 
 #include <utility>
 
 #include "base/run_loop.h"
 #include "ui/base/clipboard/clipboard.h"
+#include "ui/base/material_design/material_design_controller.h"
+#include "ui/base/test/material_design_controller_test_api.h"
 
 namespace views {
 
 ViewsTestBase::ViewsTestBase()
     : setup_called_(false),
       teardown_called_(false) {
 }
 
 ViewsTestBase::~ViewsTestBase() {
   CHECK(setup_called_)
       << "You have overridden SetUp but never called super class's SetUp";
   CHECK(teardown_called_)
       << "You have overridden TearDown but never called super class's TearDown";
 }
 
 void ViewsTestBase::SetUp() {
   testing::Test::SetUp();
+  // ContentTestSuiteBase might have already initialized

[sky, 2016/04/11 15:32:41]

and here

+  // MaterialDesignController in unit_tests suite.
+  ui::test::MaterialDesignControllerTestAPI::UninitializeMode();
+  ui::MaterialDesignController::Initialize();
   setup_called_ = true;
   if (!views_delegate_for_setup_)
     views_delegate_for_setup_.reset(new TestViewsDelegate());
 
   test_helper_.reset(
       new ScopedViewsTestHelper(std::move(views_delegate_for_setup_)));
 }
 
 void ViewsTestBase::TearDown() {
   ui::Clipboard::DestroyClipboardForCurrentThread();
@@ skipping 25 matching lines @@
 
 gfx::NativeWindow ViewsTestBase::GetContext() {
   return test_helper_->GetContext();
 }
 
 bool ViewsTestBase::IsMus() const {
   return test_helper_->IsMus();
 }
 
 }  // namespace views