Refactoring display configuration state to allow generic state objects

ui/display/chromeos/native_display_observer.h

Index: ui/display/chromeos/native_display_observer.h
diff --git a/chromeos/display/native_display_observer.h b/ui/display/chromeos/native_display_observer.h
similarity index 56%
rename from chromeos/display/native_display_observer.h
rename to ui/display/chromeos/native_display_observer.h
index de15060a9e52d530bfbe76efe2c7f5b901c991e1..ddc567d299ad650d9bf1872aac8cfdfbdf24a12c 100644
--- a/chromeos/display/native_display_observer.h
+++ b/ui/display/chromeos/native_display_observer.h
@@ -2,20 +2,22 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROMEOS_DISPLAY_NATIVE_DISPLAY_OBSERVER_H_
-#define CHROMEOS_DISPLAY_NATIVE_DISPLAY_OBSERVER_H_
+#ifndef UI_DISPLAY_CHROMEOS_NATIVE_DISPLAY_OBSERVER_H_
+#define UI_DISPLAY_CHROMEOS_NATIVE_DISPLAY_OBSERVER_H_
 
-namespace chromeos {
+#include "ui/display/display_export.h"
+
+namespace ui {
 
 // Observer class used by NativeDisplayDelegate to announce when the display
 // configuration changes.
-class NativeDisplayObserver {
+class DISPLAY_EXPORT NativeDisplayObserver {
  public:
   virtual ~NativeDisplayObserver() {}
 
   virtual void OnConfigurationChanged() = 0;
 };
 
-}  // namespace chromeos
+}  // namespace ui
 
-#endif  // CHROMEOS_DISPLAY_NATIVE_DISPLAY_OBSERVER_H_
+#endif  // UI_DISPLAY_CHROMEOS_NATIVE_DISPLAY_OBSERVER_H_