Makes MaterialDesignController initialization explicit

ui/message_center/views/message_center_view_unittest.cc

Index: ui/message_center/views/message_center_view_unittest.cc
diff --git a/ui/message_center/views/message_center_view_unittest.cc b/ui/message_center/views/message_center_view_unittest.cc
index 1d592a3312c9f6911fb6616f1f91310f46f30d7e..e61cf7733b6b6bda90d269be0f8f997b8ecf7af2 100644
--- a/ui/message_center/views/message_center_view_unittest.cc
+++ b/ui/message_center/views/message_center_view_unittest.cc
@@ -22,6 +22,7 @@
 #include "ui/message_center/views/message_list_view.h"
 #include "ui/message_center/views/notification_view.h"
 #include "ui/views/controls/slide_out_view.h"
+#include "ui/views/test/views_test_base.h"
 
 namespace message_center {
 
@@ -112,7 +113,7 @@ class FakeMessageCenterImpl : public FakeMessageCenter {
 
 /* Test fixture ***************************************************************/
 
-class MessageCenterViewTest : public testing::Test,
+class MessageCenterViewTest : public views::ViewsTestBase,
                               public MockNotificationView::Test,
                               public MessageCenterController {
  public:
@@ -158,8 +159,6 @@ class MessageCenterViewTest : public testing::Test,
  private:
   views::View* MakeParent(views::View* child1, views::View* child2);
 
-  base::MessageLoopForUI message_loop_;
-
   NotificationList::Notifications notifications_;
   scoped_ptr<MessageCenterView> message_center_view_;
   scoped_ptr<FakeMessageCenterImpl> message_center_;
@@ -175,6 +174,7 @@ MessageCenterViewTest::~MessageCenterViewTest() {
 }
 
 void MessageCenterViewTest::SetUp() {
+  views::ViewsTestBase::SetUp();
   message_center_.reset(new FakeMessageCenterImpl());
 
   // Create a dummy notification.
@@ -213,6 +213,7 @@ void MessageCenterViewTest::SetUp() {
 void MessageCenterViewTest::TearDown() {
   message_center_view_.reset();
   STLDeleteElements(&notifications_);
+  views::ViewsTestBase::TearDown();
 }
 
 MessageCenterView* MessageCenterViewTest::GetMessageCenterView() {