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

webkit/glue/webview_impl.cc

 /*
 * Copyright 2007 Google Inc. All Rights Reserved.
 *
 * Portions Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
 *
 * ***** BEGIN LICENSE BLOCK *****
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
@@ skipping 1218 matching lines @@
   *enable_ime = node->shouldUseInputMethod() &&
       !controller->isInPasswordField();
   const FrameView* view = node->document()->view();
   if (!view)
     return false;
   const IntRect rect(view->contentsToWindow(controller->absoluteCaretBounds()));
   caret_rect->SetRect(rect.x(), rect.y(), rect.width(), rect.height());
   return true;
 }
 
+void WebViewImpl::SetTextDirection(WebTextDirection direction) {
+  // The Editor::setBaseWritingDirection() function checks if we can change
+  // the text direction of the selected node and updates its DOM "dir"
+  // attribute and its CSS "direction" property.
+  // So, we just call the function as Safari does.
+  const Frame* focused = GetFocusedWebCoreFrame();
+  if (!focused)
+    return;
+  Editor* editor = focused->editor();
+  if (!editor || !editor->canEdit())
+    return;
+
+  switch (direction) {
+    case WEB_TEXT_DIRECTION_DEFAULT:
+      editor->setBaseWritingDirection(WebCore::NaturalWritingDirection);
+      break;
+
+    case WEB_TEXT_DIRECTION_LTR:
+      editor->setBaseWritingDirection(WebCore::LeftToRightWritingDirection);
+      break;
+
+    case WEB_TEXT_DIRECTION_RTL:
+      editor->setBaseWritingDirection(WebCore::RightToLeftWritingDirection);
+      break;
+
+    default:
+      NOTIMPLEMENTED();
+      break;
+  }
+}
+
 void WebViewImpl::RestoreFocus() {
   if (last_focused_frame_.get()) {
     if (last_focused_frame_->page()) {
       // last_focused_frame_ can be detached from the frame tree, thus,
       // its page can be null.
       last_focused_frame_->page()->focusController()->setFocusedFrame(
         last_focused_frame_.get());
     }
     if (last_focused_node_.get()) {
       // last_focused_node_ may be null, make sure it's valid before trying to
@@ skipping 510 matching lines @@
 
   return document->focusedNode();
 }
 
 HitTestResult WebViewImpl::HitTestResultForWindowPos(const IntPoint& pos) {
   IntPoint doc_point(
       page_->mainFrame()->view()->windowToContents(pos));
   return page_->mainFrame()->eventHandler()->
       hitTestResultAtPoint(doc_point, false);
 }