Index: services/ui/display/platform_screen.cc |
diff --git a/services/ui/display/platform_screen.cc b/services/ui/display/platform_screen.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..153331d40fee8b6918b71f7a0cd84d7ae5011594 |
--- /dev/null |
+++ b/services/ui/display/platform_screen.cc |
@@ -0,0 +1,30 @@ |
+// 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 |