Fix panel dragging on Linux Aura

ui/events/event.cc

Index: ui/events/event.cc
diff --git a/ui/events/event.cc b/ui/events/event.cc
index 41f4ca69ebb8a010a748cb70e4404fdfcb42d0ce..c0f8a51477c696df166c97c4f20a8b588d106f47 100644
--- a/ui/events/event.cc
+++ b/ui/events/event.cc
@@ -31,10 +31,15 @@ namespace {
 
 base::NativeEvent CopyNativeEvent(const base::NativeEvent& event) {
 #if defined(USE_X11)
-  if (!event || event->type == GenericEvent)
+  if (!event)
     return NULL;
   XEvent* copy = new XEvent;
   *copy = *event;
+  if (event->type == GenericEvent) {
+    copy->xcookie.data = new XIDeviceEvent;
+    *(static_cast<XIDeviceEvent*>(copy->xcookie.data)) =
+        *(static_cast<XIDeviceEvent*>(event->xcookie.data));
+  }
   return copy;
 #elif defined(OS_WIN)
   return event;
@@ -120,8 +125,11 @@ namespace ui {
 
 Event::~Event() {
 #if defined(USE_X11)
-  if (delete_native_event_)
+  if (delete_native_event_) {
+    if (native_event_ && native_event_->type == GenericEvent)
+      delete static_cast<XIDeviceEvent*>(native_event_->xcookie.data);
     delete native_event_;
+  }
 #endif
 }