Fix panel dragging on Linux Aura

ui/events/event.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/events/event.h"
 
 #if defined(USE_X11)
 #include <X11/extensions/XInput2.h>
 #include <X11/Xlib.h>
 #endif
@@ skipping 13 matching lines @@
 #if defined(USE_X11)
 #include "ui/events/keycodes/keyboard_code_conversion_x.h"
 #elif defined(USE_OZONE)
 #include "ui/events/keycodes/keyboard_code_conversion.h"
 #endif
 
 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;
 #elif defined(USE_OZONE)
   return NULL;
 #else
   NOTREACHED() <<
       "Don't know how to copy base::NativeEvent for this platform";
   return NULL;
 #endif
@@ skipping 65 matching lines @@
 
 }  // namespace
 
 namespace ui {
 
 ////////////////////////////////////////////////////////////////////////////////
 // Event
 
 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
 }
 
 bool Event::HasNativeEvent() const {
   base::NativeEvent null_event;
   std::memset(&null_event, 0, sizeof(null_event));
   return !!std::memcmp(&native_event_, &null_event, sizeof(null_event));
 }
 
 void Event::StopPropagation() {
@@ skipping 596 matching lines @@
 int GestureEvent::GetLowestTouchId() const {
   if (touch_ids_bitfield_ == 0)
     return -1;
   int i = -1;
   // Find the index of the least significant 1 bit
   while (!(1 << ++i & touch_ids_bitfield_));
   return i;
 }
 
 }  // namespace ui