Remove screen_orientation_messages.h.

content/common/screen_orientation_messages.h

Index: content/common/screen_orientation_messages.h
diff --git a/content/common/screen_orientation_messages.h b/content/common/screen_orientation_messages.h
deleted file mode 100644
index c8d1177adb28a2b883df23d5331d4c32e13a4292..0000000000000000000000000000000000000000
--- a/content/common/screen_orientation_messages.h
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2014 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.
-
-// IPC messages for screen orientation.
-// Multiply-included message file, hence no include guard.
-
-#include "content/common/content_export.h"
-#include "ipc/ipc_message_macros.h"
-#include "third_party/WebKit/public/platform/modules/screen_orientation/WebLockOrientationError.h"
-#include "third_party/WebKit/public/platform/modules/screen_orientation/WebScreenOrientationLockType.h"
-
-#undef IPC_MESSAGE_EXPORT
-#define IPC_MESSAGE_EXPORT CONTENT_EXPORT
-
-// Only used by content/common/manifest_manager_messages.h.
-IPC_ENUM_TRAITS_MIN_MAX_VALUE(blink::WebScreenOrientationLockType,
-                              blink::WebScreenOrientationLockDefault,
-                              blink::WebScreenOrientationLockNatural)