Desktop Aura: Allow tab drags out of window.

ui/base/event.cc

Index: ui/base/event.cc
diff --git a/ui/base/event.cc b/ui/base/event.cc
index 7ba1f24ac5299eacc9fcf5bb6ea81c5a0d0d7df9..62e7c229213ff6b703e104c29285c3aa9570e231 100644
--- a/ui/base/event.cc
+++ b/ui/base/event.cc
@@ -97,7 +97,8 @@ LocatedEvent::LocatedEvent(const base::NativeEvent& 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,
@@ -106,13 +107,15 @@ LocatedEvent::LocatedEvent(EventType type,
                            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) {
@@ -240,9 +243,9 @@ TouchEvent::TouchEvent(const base::NativeEvent& native_event)
 }
 
 TouchEvent::TouchEvent(EventType type,
-                               const gfx::Point& location,
-                               int touch_id,
-                               base::TimeDelta time_stamp)
+                       const gfx::Point& location,
+                       int touch_id,
+                       base::TimeDelta time_stamp)
     : LocatedEvent(type, location, location, 0),
       touch_id_(touch_id),
       radius_x_(0.0f),