A tricky fix for Issue 1845 (Take 2)....

webkit/glue/webtextdirection.h

+// Copyright (c) 2006-2008 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 WEBKIT_GLUE_WEBTEXTDIRECTION_H_
+#define WEBKIT_GLUE_WEBTEXTDIRECTION_H_
+
+// Represents text directions (or writing directions) of a DOM node.
+// This type is used as the input parameter of WebWidget::SetTextDirection().
+// This function converts these values to WebCore::WritingDirection values and
+// call the Editor::setBaseWritingDirection() function.
+// TODO(hbono): Add WEB_TEXT_DIRECTION_ORIGINAL that represents "revert the
+// previous changes and set back to the original one" and implement it.
+// TODO(hbono): Add WEB_TEXT_DIRECTION_TOGGLE that represents "toggle the text
+// direction" and implement it.
+enum WebTextDirection {
+  WEB_TEXT_DIRECTION_DEFAULT,  // WebCore::NaturalWritingDirection
+  WEB_TEXT_DIRECTION_LTR,      // WebCore::LeftToRightWritingDirection
+  WEB_TEXT_DIRECTION_RTL,      // WebCore::RightToLeftWritingDirection
+};
+
+#endif  // WEBKIT_GLUE_WEBTEXTDIRECTION_H_