Rename PlatformScreen to ScreenManager.

services/ui/ws/window_manager_state_unittest.cc

Index: services/ui/ws/window_manager_state_unittest.cc
diff --git a/services/ui/ws/window_manager_state_unittest.cc b/services/ui/ws/window_manager_state_unittest.cc
index eebde144c1668701661138decdd8f9f35f86c091..a67f0bfc6a60b56ecc8d5c02e88f8b338e3f4e75 100644
--- a/services/ui/ws/window_manager_state_unittest.cc
+++ b/services/ui/ws/window_manager_state_unittest.cc
@@ -547,9 +547,9 @@ TEST_F(WindowManagerStateTest, PostAcceleratorForgotten) {
 TEST(WindowManagerStateShutdownTest, DestroyTreeBeforeDisplay) {
   WindowServerTestHelper ws_test_helper;
   WindowServer* window_server = ws_test_helper.window_server();
-  TestPlatformScreen platform_screen;
-  platform_screen.Init(window_server->display_manager());
-  platform_screen.AddDisplay();
+  TestScreenManager screen_manager;
+  screen_manager.Init(window_server->display_manager());
+  screen_manager.AddDisplay();
   const UserId kUserId1 = "2";
   AddWindowManager(window_server, kUserId1);
   ASSERT_EQ(1u, window_server->display_manager()->displays().size());