Fix build on Fedora 20.

The build broke because atk_focus_tracker_notify is deprecated since ATK
2.9.4 and Chromium builds with warnings set as errors.

BUG=298815

Review URL: https://codereview.chromium.org/25166002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225895 0039d316-1c4b-4281-b951-d872f2087c98

AUTHORS

@@ -276,6 +276,7 @@ Vamshikrishna Yellenki <vamshi@motorola.com>
 Vedran Šajatović <vedran.sajatovic@gmail.com>
 Vernon Tang <vt@foilhead.net>
 Viatcheslav Ostapenko <sl.ostapenko@samsung.com>
+Victor Costan <costan@gmail.com>
 Viet-Trung Luu <viettrungluu@gmail.com>
 Vinay Anantharaman <vinaya@adobe.com>
 Vipul Bhasin <vipul.bhasin@gmail.com>

content/browser/accessibility/browser_accessibility_manager_gtk.cc

@@ -56,11 +56,9 @@ void BrowserAccessibilityManagerGtk::NotifyAccessibilityEvent(
       RecursivelySendChildrenChanged(GetRoot()->ToBrowserAccessibilityGtk());
       break;
     case WebKit::WebAXEventFocus:
-      // Note: atk_focus_tracker_notify may be deprecated in the future;
-      // follow this bug for the replacement:
-      // https://bugzilla.gnome.org/show_bug.cgi?id=649575#c4
+      // Note: the focus-event was deprecated in ATK 2.9.4
+      // See https://bugzilla.gnome.org/show_bug.cgi?id=649575#c8
       g_signal_emit_by_name(atk_object, "focus-event", true);
-      atk_focus_tracker_notify(atk_object);
       break;
     default:
       break;