Hide icons in message center on lock screen

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 5a16ecd1c86406baccd6965b7ffd49c77386b126..e038a8d5854c25ff69d67abf4930194ec06680e5 100644
--- a/ui/message_center/views/message_center_view_unittest.cc
+++ b/ui/message_center/views/message_center_view_unittest.cc
@@ -755,6 +755,18 @@ TEST_F(MessageCenterViewTest, LockScreen) {
   EXPECT_TRUE(GetNotificationView(kNotificationId1)->IsDrawn());
   EXPECT_TRUE(GetNotificationView(kNotificationId2)->IsDrawn());
 
+  views::Button* close_button = GetButtonBar()->GetCloseAllButtonForTest();
+  ASSERT_NE(nullptr, close_button);
+  views::Button* quiet_mode_button =
+      GetButtonBar()->GetQuietModeButtonForTest();
+  ASSERT_NE(nullptr, quiet_mode_button);
+  views::Button* settings_button = GetButtonBar()->GetSettingsButtonForTest();
+  ASSERT_NE(nullptr, settings_button);
+
+  EXPECT_TRUE(close_button->visible());
+  EXPECT_TRUE(quiet_mode_button->visible());
+  EXPECT_TRUE(settings_button->visible());
+
   // Lock!
   SetLockedState(true);
 
@@ -785,6 +797,10 @@ TEST_F(MessageCenterViewTest, LockScreen) {
   GetMessageCenterView()->SizeToPreferredSize();
   EXPECT_EQ(kLockedMessageCenterViewHeight, GetMessageCenterView()->height());
 
+  EXPECT_FALSE(close_button->visible());
+  EXPECT_FALSE(quiet_mode_button->visible());
+  EXPECT_FALSE(settings_button->visible());
+
   // Unlock!
   SetLockedState(false);
 
@@ -793,6 +809,10 @@ TEST_F(MessageCenterViewTest, LockScreen) {
   GetMessageCenterView()->SizeToPreferredSize();
   EXPECT_NE(kLockedMessageCenterViewHeight, GetMessageCenterView()->height());
 
+  EXPECT_TRUE(close_button->visible());
+  EXPECT_TRUE(quiet_mode_button->visible());
+  EXPECT_TRUE(settings_button->visible());
+
   // Lock!
   SetLockedState(true);
 
@@ -800,6 +820,10 @@ TEST_F(MessageCenterViewTest, LockScreen) {
 
   GetMessageCenterView()->SizeToPreferredSize();
   EXPECT_EQ(kLockedMessageCenterViewHeight, GetMessageCenterView()->height());
+
+  EXPECT_FALSE(close_button->visible());
+  EXPECT_FALSE(quiet_mode_button->visible());
+  EXPECT_FALSE(settings_button->visible());
 }
 
 TEST_F(MessageCenterViewTest, NoNotification) {