A quick fix for supporting bidirectional texts in omnibox2....

chrome/browser/views/autocomplete/autocomplete_popup_contents_view.cc

 // Copyright (c) 2009 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.
 
 #include "chrome/browser/views/autocomplete/autocomplete_popup_contents_view.h"
 
 #include <dwmapi.h>
 
 #include "chrome/browser/autocomplete/autocomplete_edit_view_win.h"
 #include "chrome/browser/autocomplete/autocomplete_popup_model.h"
@@ skipping 117 matching lines @@
   static SkBitmap* icon_url_selected_;
   static SkBitmap* icon_history_;
   static SkBitmap* icon_history_selected_;
   static SkBitmap* icon_search_;
   static SkBitmap* icon_search_selected_;
   static SkBitmap* icon_more_;
   static SkBitmap* icon_more_selected_;
   static SkBitmap* icon_star_;
   static SkBitmap* icon_star_selected_;
   static int icon_size_;
-  
+
   static bool initialized_;
   static void InitClass();
 
   DISALLOW_COPY_AND_ASSIGN(AutocompleteResultView);
 };
 
 // static
 SkBitmap* AutocompleteResultView::icon_url_ = NULL;
 SkBitmap* AutocompleteResultView::icon_url_selected_ = NULL;
 SkBitmap* AutocompleteResultView::icon_history_ = NULL;
@@ skipping 258 matching lines @@
     // Split this run with the given classifications and draw the fragments
     // into the local display context.
     for (ACMatchClassifications::const_iterator i = classifications.begin();
          i != classifications.end(); ++i) {
       const int text_start = std::max(run_start, static_cast<int>(i->offset));
       const int text_end = std::min(run_end, (i != classifications.end() - 1) ?
           static_cast<int>((i + 1)->offset) : run_end);
       int style = i->style;
       if (force_dim)
         style |= ACMatchClassification::DIM;
-      x += DrawStringFragment(canvas,
-                              text.substr(text_start, text_end - text_start),
-                              style, x, y);
+      if (text_start < text_end) {
+        x += DrawStringFragment(canvas,
+                                text.substr(text_start, text_end - text_start),
+                                style, x, y);
+      }
     }
   }
   return x;
 }
 
 int AutocompleteResultView::DrawStringFragment(
     ChromeCanvas* canvas,
     const std::wstring& text,
     int style,
     int x,
@@ skipping 362 matching lines @@
 void AutocompletePopupContentsView::MakeCanvasTransparent(
     ChromeCanvas* canvas) {
   // Allow the window blur effect to show through the popup background.
   SkPaint paint;
   paint.setColor(SkColorSetARGB(kPopupTransparency, 255, 255, 255));
   paint.setPorterDuffXfermode(SkPorterDuff::kDstIn_Mode);
   paint.setStyle(SkPaint::kFill_Style);
   canvas->FillRectInt(0, 0, canvas->getDevice()->width(),
                       canvas->getDevice()->height(), paint);
 }
-