Expose native, desktop and mobile gesture detection defaults

ui/chromeos/touch_exploration_controller.cc

Index: ui/chromeos/touch_exploration_controller.cc
diff --git a/ui/chromeos/touch_exploration_controller.cc b/ui/chromeos/touch_exploration_controller.cc
index 7e00b640ab3b39cc824d7dce80fbc7b595528d34..ad71f782ee7c3c0586d45c5304d392cadfc93dee 100644
--- a/ui/chromeos/touch_exploration_controller.cc
+++ b/ui/chromeos/touch_exploration_controller.cc
@@ -149,9 +149,12 @@ ui::EventRewriteStatus TouchExplorationController::RewriteEvent(
   // leaves one of these states, SET_STATE will set the gesture provider to
   // NULL.
   if (gesture_provider_.get()) {
-    gesture_provider_->OnTouchEvent(touch_event);
-    gesture_provider_->OnSyncTouchEventAck(touch_event.unique_event_id(),
-                                           false);
+    ui::TouchEvent mutable_touch_event(touch_event,
+                                       static_cast<aura::Window*>(nullptr),
+                                       static_cast<aura::Window*>(nullptr));

[sadrul, 2014/12/15 17:40:46]

Can you just do: mutable_touch_event = touch_event;?

[jdduke (slow), 2014/12/15 18:37:37]

Hmm, much better, I guess assignment works but not the copy constructor.

+    gesture_provider_->OnTouchEvent(&mutable_touch_event);
+    gesture_provider_->OnSyncTouchEventAck(
+        mutable_touch_event.unique_event_id(), false);
     ProcessGestureEvents();
   }