Move screen_orientation public headers to module directory.

public/platform/modules/screen_orientation/WebLockOrientationCallback.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2015 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.
 
 #ifndef WebLockOrientationCallback_h
 #define WebLockOrientationCallback_h
 
-#include "public/platform/WebLockOrientationError.h"
-#include "public/platform/WebScreenOrientationType.h"
+#include "public/platform/modules/screen_orientation/WebLockOrientationError.h"
+#include "public/platform/modules/screen_orientation/WebScreenOrientationType.h"
 
 namespace blink {
 
 // WebScreenOrientationType is an interface to be used by the embedder in order
 // to inform Blink when a screen lock operation has succeeded or failed.
 // A success notification comes with the new orientation angle and orientation
 // type and a failure notification comes with an information about the type of
 // failure.
 class WebLockOrientationCallback {
 public:
     virtual ~WebLockOrientationCallback() { }
 
     virtual void onSuccess() = 0;
     virtual void onError(WebLockOrientationError) = 0;
 };
 
 } // namespace blink
 
 #endif // WebLockOrientationCallback_h