Move screen_orientation public headers to module directory.

public/platform/WebLockOrientationError.h

Index: public/platform/WebLockOrientationError.h
diff --git a/public/platform/WebLockOrientationError.h b/public/platform/WebLockOrientationError.h
index d0624568d58cc423c18b1e2a7a85f4e86c2a6570..c33186db5757dafdd8fc87706d059b00d5ae0015 100644
--- a/public/platform/WebLockOrientationError.h
+++ b/public/platform/WebLockOrientationError.h
@@ -2,22 +2,4 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef WebLockOrientationError_h
-#define WebLockOrientationError_h
-
-namespace blink {
-
-enum WebLockOrientationError {
-    // If locking isn't available on the platform.
-    WebLockOrientationErrorNotAvailable,
-
-    // If fullscreen is required to lock.
-    WebLockOrientationErrorFullScreenRequired,
-
-    // If another lock/unlock got called before that one ended.
-    WebLockOrientationErrorCanceled,
-};
-
-} // namespace blink
-
-#endif // WebLockOrientationError_h
+#include "public/platform/modules/screen_orientation/WebLockOrientationError.h"