Use WTF::TimeTicks to represent timestamp in Platform/Core event types

third_party/WebKit/Source/core/events/DragEvent.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 DragEvent_h
 #define DragEvent_h
 
 #include "core/CoreExport.h"
 #include "core/events/DragEventInit.h"
 #include "core/events/MouseEvent.h"
@@ skipping 20 matching lines @@
                            int screenX,
                            int screenY,
                            int windowX,
                            int windowY,
                            int movementX,
                            int movementY,
                            PlatformEvent::Modifiers,
                            short button,
                            unsigned short buttons,
                            EventTarget* relatedTarget,
-                           double platformTimeStamp,
+                           TimeTicks platformTimeStamp,
                            DataTransfer*,
                            PlatformMouseEvent::SyntheticEventType =
                                PlatformMouseEvent::RealOrIndistinguishable);
 
   static DragEvent* create(const AtomicString& type,
                            const DragEventInit& initializer) {
     return new DragEvent(type, initializer);
   }
 
   DataTransfer* getDataTransfer() const override {
@@ skipping 18 matching lines @@
             int screenX,
             int screenY,
             int windowX,
             int windowY,
             int movementX,
             int movementY,
             PlatformEvent::Modifiers,
             short button,
             unsigned short buttons,
             EventTarget* relatedTarget,
-            double platformTimeStamp,
+            TimeTicks platformTimeStamp,
             DataTransfer*,
             PlatformMouseEvent::SyntheticEventType);
 
   DragEvent(const AtomicString& type, const DragEventInit&);
 
   Member<DataTransfer> m_dataTransfer;
 };
 
 class DragEventDispatchMediator final : public EventDispatchMediator {
  public:
   static DragEventDispatchMediator* create(DragEvent*);
 
  private:
   explicit DragEventDispatchMediator(DragEvent*);
   DragEvent& event() const;
   DispatchEventResult dispatchEvent(EventDispatcher&) const override;
 };
 
 DEFINE_EVENT_TYPE_CASTS(DragEvent);
 
 }  // namespace blink
 
 #endif  // DragEvent_h