Adding persistance for gesture recognition parms.

ui/aura/gestures/gesture_configuration.h

Index: ui/aura/gestures/gesture_configuration.h
diff --git a/ui/aura/gestures/gesture_configuration.h b/ui/aura/gestures/gesture_configuration.h
index a1365b4f0fdb76a31a5ab58efeb53acf3b85ec53..f36cf99bd89438d4b7c0f79495ae912c03600581 100644
--- a/ui/aura/gestures/gesture_configuration.h
+++ b/ui/aura/gestures/gesture_configuration.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include "base/basictypes.h"
+#include "ui/aura/aura_export.h"
 
 namespace aura {
 
@@ -14,7 +15,7 @@ namespace aura {
 // approaches (windows, chrome, others).  This would turn into an
 // abstract base class.
 
-class GestureConfiguration {
+class AURA_EXPORT GestureConfiguration {
  public:
   static double max_touch_down_duration_in_seconds_for_click() {
     return max_touch_down_duration_in_seconds_for_click_;