A tricky fix for Issue 1845....

chrome/renderer/render_widget.cc

Index: chrome/renderer/render_widget.cc
===================================================================
--- chrome/renderer/render_widget.cc	(revision 11937)
+++ chrome/renderer/render_widget.cc	(working copy)
@@ -119,6 +119,7 @@
   IPC_MESSAGE_HANDLER(ViewMsg_ImeSetInputMode, OnImeSetInputMode)
   IPC_MESSAGE_HANDLER(ViewMsg_ImeSetComposition, OnImeSetComposition)
   IPC_MESSAGE_HANDLER(ViewMsg_Repaint, OnMsgRepaint)
+  IPC_MESSAGE_HANDLER(ViewMsg_SetTextDirection, OnSetTextDirection)
   IPC_MESSAGE_UNHANDLED_ERROR()
 IPC_END_MESSAGE_MAP()
 
@@ -635,6 +636,13 @@
   DidInvalidateRect(webwidget_, repaint_rect);
 }
 
+void RenderWidget::OnSetTextDirection(WebTextDirection direction) {
+  if (!webwidget_)
+    return;
+
+  webwidget_->SetTextDirection(direction);
+}
+
 bool RenderWidget::next_paint_is_resize_ack() const {
   return ViewHostMsg_PaintRect_Flags::is_resize_ack(next_paint_flags_);
 }