Revert "chromeos: Move files in //ash/common to //ash, part 1"

ash/common/system/chromeos/screen_security/screen_capture_observer.h

Index: ash/common/system/chromeos/screen_security/screen_capture_observer.h
diff --git a/ash/system/screen_security/screen_capture_observer.h b/ash/common/system/chromeos/screen_security/screen_capture_observer.h
similarity index 72%
rename from ash/system/screen_security/screen_capture_observer.h
rename to ash/common/system/chromeos/screen_security/screen_capture_observer.h
index 88760a16aa18441710d8354aaadde8514e89ef8d..854cb4a2c6017897a588a06ddebc5441c94aac83 100644
--- a/ash/system/screen_security/screen_capture_observer.h
+++ b/ash/common/system/chromeos/screen_security/screen_capture_observer.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_SYSTEM_SCREEN_SECURITY_SCREEN_CAPTURE_OBSERVER_H_
-#define ASH_SYSTEM_SCREEN_SECURITY_SCREEN_CAPTURE_OBSERVER_H_
+#ifndef ASH_COMMON_SYSTEM_CHROMEOS_SCREEN_SECURITY_SCREEN_CAPTURE_OBSERVER_H_
+#define ASH_COMMON_SYSTEM_CHROMEOS_SCREEN_SECURITY_SCREEN_CAPTURE_OBSERVER_H_
 
 #include "base/callback.h"
 #include "base/strings/string16.h"
@@ -26,4 +26,4 @@ class ScreenCaptureObserver {
 
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_SCREEN_SECURITY_SCREEN_CAPTURE_OBSERVER_H_
+#endif  // ASH_COMMON_SYSTEM_CHROMEOS_SCREEN_SECURITY_SCREEN_CAPTURE_OBSERVER_H_