A tricky fix for Issue 1845....

chrome/common/render_messages.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 CHROME_COMMON_RENDER_MESSAGES_H_
 #define CHROME_COMMON_RENDER_MESSAGES_H_
 
 #include <string>
 #include <vector>
 #include <map>
@@ skipping 20 matching lines @@
 #include "webkit/glue/feed.h"
 #include "webkit/glue/form_data.h"
 #include "webkit/glue/password_form.h"
 #include "webkit/glue/password_form_dom_manager.h"
 #include "webkit/glue/resource_loader_bridge.h"
 #include "webkit/glue/screen_info.h"
 #include "webkit/glue/webdropdata.h"
 #include "webkit/glue/webinputevent.h"
 #include "webkit/glue/webplugin.h"
 #include "webkit/glue/webpreferences.h"
+#include "webkit/glue/webtextdirection.h"
 #include "webkit/glue/webview_delegate.h"
 
 #if defined(OS_POSIX)
 #include "skia/include/SkBitmap.h"
 #endif
 
 struct ViewHostMsg_UpdateFeedList_Params {
   // The page_id for this navigation, or -1 if it is a new navigation.  Back,
   // Forward, and Reload navigations should have a valid page_id.  If the load
   // succeeds, then this page_id will be reflected in the resulting
@@ skipping 1775 matching lines @@
        break;
      default:
       state = L"UNKNOWN";
       break;
     }
 
     LogParam(state, l);
   }
 };
 
+template <>
+struct ParamTraits<WebTextDirection> {
+  typedef WebTextDirection param_type;
+  static void Write(Message* m, const param_type& p) {
+    m->WriteInt(p);
+  }
+  static bool Read(const Message* m, void** iter, param_type* p) {
+    int type;
+    if (!m->ReadInt(iter, &type))
+      return false;
+    *p = static_cast<WebTextDirection>(type);
+    return true;
+  }
+  static void Log(const param_type& p, std::wstring* l) {
+    std::wstring control;
+    switch (p) {
+     case WEB_TEXT_DIRECTION_DEFAULT:
+      control = L"WEB_TEXT_DIRECTION_DEFAULT";
+      break;
+     case WEB_TEXT_DIRECTION_RTL:
+      control = L"WEB_TEXT_DIRECTION_RTL";
+      break;
+     case WEB_TEXT_DIRECTION_LTR:
+      control = L"WEB_TEXT_DIRECTION_LTR";
+      break;
+     default:
+      control = L"UNKNOWN";
+      break;
+    }
+
+    LogParam(control, l);
+  }
+};
 
 }  // namespace IPC
 
 
 #define MESSAGES_INTERNAL_FILE "chrome/common/render_messages_internal.h"
 #include "chrome/common/ipc_message_macros.h"
 
 #endif  // CHROME_COMMON_RENDER_MESSAGES_H_