Rename PlatformScreen to ScreenManager.

services/ui/display/platform_screen.cc

Index: services/ui/display/platform_screen.cc
diff --git a/services/ui/display/platform_screen.cc b/services/ui/display/platform_screen.cc
deleted file mode 100644
index 153331d40fee8b6918b71f7a0cd84d7ae5011594..0000000000000000000000000000000000000000
--- a/services/ui/display/platform_screen.cc
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright 2016 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 "services/ui/display/platform_screen.h"
-
-#include "base/logging.h"
-
-namespace display {
-
-// static
-PlatformScreen* PlatformScreen::instance_ = nullptr;
-
-PlatformScreen::PlatformScreen() {
-  DCHECK(!instance_);
-  instance_ = this;
-}
-
-PlatformScreen::~PlatformScreen() {
-  DCHECK_EQ(instance_, this);
-  instance_ = nullptr;
-}
-
-// static
-PlatformScreen* PlatformScreen::GetInstance() {
-  DCHECK(instance_);
-  return instance_;
-}
-
-}  // namespace display