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

chrome/browser/renderer_host/render_widget_host.cc

Index: chrome/browser/renderer_host/render_widget_host.cc
===================================================================
--- chrome/browser/renderer_host/render_widget_host.cc	(revision 12427)
+++ chrome/browser/renderer_host/render_widget_host.cc	(working copy)
@@ -17,6 +17,7 @@
 #include "chrome/views/view.h"
 #include "webkit/glue/webcursor.h"
 #include "webkit/glue/webinputevent.h"
+#include "webkit/glue/webtextdirection.h"
 
 #if defined(OS_WIN)
 #include "base/gfx/gdi_util.h"
@@ -53,7 +54,9 @@
       mouse_move_pending_(false),
       needs_repainting_on_restore_(false),
       is_unresponsive_(false),
-      view_being_painted_(false) {
+      view_being_painted_(false),
+      text_direction_updated_(false),
+      text_direction_(WEB_TEXT_DIRECTION_LTR) {
   if (routing_id_ == MSG_ROUTING_NONE)
     routing_id_ = process_->GetNextRoutingID();
 
@@ -352,6 +355,19 @@
   BackingStoreManager::RemoveBackingStore(this);
 }
 
+void RenderWidgetHost::UpdateTextDirection(WebTextDirection direction) {
+  text_direction_updated_ = true;
+  text_direction_ = direction;
+}
+
+void RenderWidgetHost::NotifyTextDirection() {
+  if (text_direction_updated_) {
+    text_direction_updated_ = false;
+    Send(new ViewMsg_SetTextDirection(routing_id(),
+                                      static_cast<int>(text_direction_)));
+  }
+}
+
 gfx::Rect RenderWidgetHost::GetRootWindowResizerRect() const {
   return gfx::Rect();
 }