Change ui::Event::time_stamp from TimeDelta to TimeTicks

ui/events/blink/blink_event_util.h

 // Copyright 2015 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.
 
 #ifndef UI_EVENTS_BLINK_BLINK_EVENT_UTIL_H_
 #define UI_EVENTS_BLINK_BLINK_EVENT_UTIL_H_
 
 #include <memory>
 
 #include "third_party/WebKit/public/web/WebInputEvent.h"
@@ skipping 16 matching lines @@
 namespace ui {
 struct GestureEventData;
 struct GestureEventDetails;
 class MotionEvent;
 
 blink::WebTouchEvent CreateWebTouchEventFromMotionEvent(
     const MotionEvent& event,
     bool may_cause_scrolling);
 
 blink::WebGestureEvent CreateWebGestureEvent(const GestureEventDetails& details,
-                                             base::TimeDelta timestamp,
+                                             base::TimeTicks timestamp,
                                              const gfx::PointF& location,
                                              const gfx::PointF& raw_location,
                                              int flags);
 
 // Convenience wrapper for |CreateWebGestureEvent| using the supplied |data|.
 blink::WebGestureEvent CreateWebGestureEventFromGestureEventData(
     const GestureEventData& data);
 
 int EventFlagsToWebEventModifiers(int flags);
 
 std::unique_ptr<blink::WebInputEvent> ScaleWebInputEvent(
     const blink::WebInputEvent& event,
     float scale);
 
 blink::WebPointerProperties::PointerType ToWebPointerType(
     MotionEvent::ToolType tool_type);
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_BLINK_BLINK_EVENT_UTIL_H_