Use high precision timestamp for Event.timestamp

third_party/WebKit/Source/core/html/forms/TypeAhead.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 #ifndef TypeAhead_h
 #define TypeAhead_h
 
 #include "core/CoreExport.h"
-#include "core/dom/DOMTimeStamp.h"
 #include "wtf/Allocator.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class KeyboardEvent;
 
 class CORE_EXPORT TypeAheadDataSource {
 public:
@@ skipping 16 matching lines @@
     };
     using MatchModeFlags = unsigned;
 
     // Returns the index for the matching option.
     int handleEvent(KeyboardEvent*, MatchModeFlags);
     bool hasActiveSession(KeyboardEvent*);
     void resetSession();
 
 private:
     TypeAheadDataSource* m_dataSource;
-    DOMTimeStamp m_lastTypeTime;
+    // platform timestamp of last keyboard event in seconds
+    double m_lastTypeTime;
     UChar m_repeatingChar;
     StringBuilder m_buffer;
 };
 
 } // namespace blink
 
 #endif // TypeAhead_h