Linux Aura accessibility is enabled only on GNOME desktops

ui/accessibility/platform/atk_util_auralinux.h

Index: ui/accessibility/platform/atk_util_auralinux.h
diff --git a/ui/accessibility/platform/atk_util_auralinux.h b/ui/accessibility/platform/atk_util_auralinux.h
index 349c41a53de07af1061fbb44f598efdb221be2e4..87539762bdb13526a67ca21e155d36fe7ad6935d 100644
--- a/ui/accessibility/platform/atk_util_auralinux.h
+++ b/ui/accessibility/platform/atk_util_auralinux.h
@@ -5,9 +5,15 @@
 #ifndef UI_ACCESSIBILITY_AX_UTIL_AURALINUX_H_
 #define UI_ACCESSIBILITY_AX_UTIL_AURALINUX_H_
 
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "ui/accessibility/ax_export.h"
 
+namespace base {
+class Thread;
+}
+
 namespace ui {
 
 // This singleton class initializes ATK (accessibility toolkit) and
@@ -20,9 +26,17 @@ class AtkUtilAuraLinux {
 
   AtkUtilAuraLinux();
   virtual ~AtkUtilAuraLinux();
-
  private:
   friend struct DefaultSingletonTraits<AtkUtilAuraLinux>;
+
+  void CheckIfAccessibilityIsEnabled();
+  void CheckPlatformAccessibilitySupport();
+  void OnStopAccessibilityThread();
+
+#if defined(USE_GCONF) || defined(USE_DBUS)
+  bool is_enabled_;
+  scoped_ptr<base::Thread> accessibility_init_thread_;
+#endif
 };
 
 }  // namespace ui