sky-scrollable should use a reasonable fling curve

sky/engine/core/loader/DocumentLoadTiming.cpp

 /*
  * Copyright (C) 2011 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 26 matching lines @@
     , m_unloadEventStart(0.0)
     , m_unloadEventEnd(0.0)
     , m_fetchStart(0.0)
     , m_responseEnd(0.0)
     , m_loadEventStart(0.0)
     , m_loadEventEnd(0.0)
     , m_hasSameOriginAsPreviousDocument(false)
 {
 }
 
-double DocumentLoadTiming::monotonicTimeToZeroBasedDocumentTime(double monotonicTime) const
-{
-    if (!monotonicTime)
-        return 0.0;
-    return monotonicTime - m_referenceMonotonicTime;
-}
-
 double DocumentLoadTiming::monotonicTimeToPseudoWallTime(double monotonicTime) const
 {
     if (!monotonicTime)
         return 0.0;
     return m_referenceWallTime + monotonicTime - m_referenceMonotonicTime;
 }
 
 void DocumentLoadTiming::markNavigationStart()
 {
     ASSERT(!m_navigationStart && !m_referenceMonotonicTime && !m_referenceWallTime);
 
     m_navigationStart = m_referenceMonotonicTime = monotonicallyIncreasingTime();
     m_referenceWallTime = currentTime();
 }
 
 void DocumentLoadTiming::setNavigationStart(double navigationStart)
 {
     ASSERT(m_referenceMonotonicTime && m_referenceWallTime);
     m_navigationStart = navigationStart;
 
     // |m_referenceMonotonicTime| and |m_referenceWallTime| represent
     // navigationStart. When the embedder sets navigationStart (because the
     // navigation started earlied on the browser side), we need to adjust these
     // as well.
     m_referenceWallTime = monotonicTimeToPseudoWallTime(navigationStart);
     m_referenceMonotonicTime = navigationStart;
 }
 
 } // namespace blink