Release slotId of TouchEvent when USE_XI2_MT defined

ui/base/x/events_x.cc

Index: ui/base/x/events_x.cc
diff --git a/ui/base/x/events_x.cc b/ui/base/x/events_x.cc
index 3d3b7a65624efa1f29a59441e42b5192e4bd833d..480a0412d308ae2d4ae704c63793dc5771ab0dd3 100644
--- a/ui/base/x/events_x.cc
+++ b/ui/base/x/events_x.cc
@@ -349,8 +349,14 @@ int GetTouchId(const base::NativeEvent& xev) {
   if (!factory->ExtractTouchParam(
          *xev, ui::TouchFactory::TP_TRACKING_ID, &tracking_id))
     LOG(ERROR) << "Could not get the slot ID for the event. Using 0.";
-  else
+  else {

[sadrul, 2011/12/08 17:04:41]

If you need brace in one, you should use them for all.

i.e.

if (!factory...) {
  ...
} else {
  ...
}

     slot = factory->GetSlotForTrackingID(tracking_id);
+    ui::EventType type = ui::EventTypeFromNative(xev);
+    if (type == ui::ET_TOUCH_CANCELLED ||
+        type == ui::ET_TOUCH_RELEASED) {
+      factory->ReleaseSlotForTrackingID(tracking_id);
+    }
+  }
 #else
   if (!factory->ExtractTouchParam(
          *xev, ui::TouchFactory::TP_SLOT_ID, &slot))