Desktop Aura: Allow tab drags out of window.

ui/base/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/base/event.h"
 
 #if defined(USE_X11)
 #include <X11/Xlib.h>
 #endif
 
@@ skipping 82 matching lines @@
 // LocatedEvent
 
 LocatedEvent::~LocatedEvent() {
 }
 
 LocatedEvent::LocatedEvent(const base::NativeEvent& native_event)
     : Event(native_event,
             EventTypeFromNative(native_event),
             EventFlagsFromNative(native_event)),
       location_(EventLocationFromNative(native_event)),
-      root_location_(location_) {
+      root_location_(location_),
+      system_location_(ui::EventSystemLocationFromNative(native_event)) {
 }
 
 LocatedEvent::LocatedEvent(EventType type,
                            const gfx::Point& location,
                            const gfx::Point& root_location,
                            int flags)
     : Event(type, flags),
       location_(location),
-      root_location_(root_location) {
+      root_location_(root_location),
+      system_location_(-1, -1) {
 }
 
 LocatedEvent::LocatedEvent(const LocatedEvent& model)
     : Event(model),
       location_(model.location_),
-      root_location_(model.root_location_) {
+      root_location_(model.root_location_),
+      system_location_(model.system_location_) {
 }
 
 void LocatedEvent::UpdateForRootTransform(const Transform& root_transform) {
   // Transform has to be done at root level.
   DCHECK_EQ(root_location_.x(), location_.x());
   DCHECK_EQ(root_location_.y(), location_.y());
   gfx::Point3f p(location_);
   root_transform.TransformPointReverse(p);
   root_location_ = location_ = p.AsPoint();
 }
@@ skipping 337 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