gestures: Some more event cleanup.

ui/base/event.cc

Index: ui/base/event.cc
diff --git a/ui/base/event.cc b/ui/base/event.cc
index 28392362d63e79307e926c40bc142aa5f3a147d0..fc08cf795e0502c3b4fe3d8b61bed3b71812fb51 100644
--- a/ui/base/event.cc
+++ b/ui/base/event.cc
@@ -377,13 +377,13 @@ GestureEvent::GestureEvent(EventType type,
                            int x,
                            int y,
                            int flags,
-                           base::Time time_stamp,
+                           base::TimeDelta time_stamp,
                            const GestureEventDetails& details,
                            unsigned int touch_ids_bitfield)
     : LocatedEvent(type, gfx::Point(x, y), gfx::Point(x, y), flags),
       details_(details),
       touch_ids_bitfield_(touch_ids_bitfield) {
-  set_time_stamp(base::TimeDelta::FromSeconds(time_stamp.ToDoubleT()));
+  set_time_stamp(time_stamp);
 }
 
 GestureEvent::~GestureEvent() {