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
@@ skipping 46 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;
+    double m_lastTypeTime;

[Rick Byers, 2015/09/25 17:29:33]

Can this be a DOMHighRestTimestamp to make it clear what the semantics are?  Or
perhaps we should typedef something new?  Just a shame to loose some
documentation here about what exactly the double represents.

[majidvp, 2015/09/29 14:21:31]

This is not really a DOMHighResTimeStamp but the actual platform timestamp in
seconds.
Converting to DOMHighRestTimeStamp and using Event.timeStamp is not appropriate
here because we only care about the delta and extra calculations to convert are
unnecessary and confusing. 

[Rick Byers, 2015/09/29 15:57:59]

Thanks, makes sense.  Adding the comment is good enough for me.

     UChar m_repeatingChar;
     StringBuilder m_buffer;
 };
 
 } // namespace blink
 
 #endif // TypeAhead_h