Add a context field to the accessibility extension API.

chrome/browser/ui/gtk/location_bar_view_gtk.cc

 // Copyright (c) 2011 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/ui/gtk/location_bar_view_gtk.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 533 matching lines @@
 
   toolbar_model_->set_input_in_progress(in_progress);
   Update(NULL);
 }
 
 void LocationBarViewGtk::OnKillFocus() {
 }
 
 void LocationBarViewGtk::OnSetFocus() {
   Profile* profile = browser_->profile();
-  AccessibilityTextBoxInfo info(profile,
-      l10n_util::GetStringUTF8(IDS_ACCNAME_LOCATION), false);
+  AccessibilityTextBoxInfo info(
+      profile,
+      l10n_util::GetStringUTF8(IDS_ACCNAME_LOCATION),
+      std::string(),
+      false);
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_ACCESSIBILITY_CONTROL_FOCUSED,
       content::Source<Profile>(profile),
       content::Details<AccessibilityTextBoxInfo>(&info));
 
   // Update the keyword and search hint states.
   OnChanged();
 }
 
 SkBitmap LocationBarViewGtk::GetFavicon() const {
@@ skipping 1079 matching lines @@
 
   std::string badge_text = page_action_->GetBadgeText(tab_id);
   if (badge_text.empty())
     return FALSE;
 
   gfx::CanvasSkiaPaint canvas(event, false);
   gfx::Rect bounding_rect(widget->allocation);
   page_action_->PaintBadge(&canvas, bounding_rect, tab_id);
   return FALSE;
 }