[DeviceService] Move screen_orientation.mojom from //content to //device.

content/common/screen_orientation.mojom

Index: content/common/screen_orientation.mojom
diff --git a/content/common/screen_orientation.mojom b/content/common/screen_orientation.mojom
deleted file mode 100644
index 558ba2d7749e00df7afd345da7e6a67dd8846544..0000000000000000000000000000000000000000
--- a/content/common/screen_orientation.mojom
+++ /dev/null
@@ -1,13 +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.
-
-module content.mojom;
-
-import "third_party/WebKit/public/platform/modules/screen_orientation/screen_orientation_lock_types.mojom";
-
-interface ScreenOrientation {
-  LockOrientation(blink.mojom.ScreenOrientationLockType orientation) =>
-    (blink.mojom.ScreenOrientationLockResult result);
-  UnlockOrientation();
-};