Trace where timers were scheduled in Blink

Source/core/css/resolver/MatchedPropertiesCache.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 71 matching lines @@
         return 0;
     return cacheItem;
 }
 
 void MatchedPropertiesCache::add(const RenderStyle* style, const RenderStyle* parentStyle, unsigned hash, const MatchResult& matchResult)
 {
     static const unsigned maxAdditionsBetweenSweeps = 100;
     if (++m_additionsSinceLastSweep >= maxAdditionsBetweenSweeps
         && !m_sweepTimer.isActive()) {
         static const unsigned sweepTimeInSeconds = 60;
-        m_sweepTimer.startOneShot(sweepTimeInSeconds);
+        m_sweepTimer.startOneShot(sweepTimeInSeconds, FROM_HERE);
     }
 
     ASSERT(hash);
     Cache::AddResult addResult = m_cache.add(hash, nullptr);
     if (addResult.isNewEntry)
         addResult.storedValue->value = adoptPtr(new CachedMatchedProperties);
 
     CachedMatchedProperties* cacheItem = addResult.storedValue->value.get();
     if (!addResult.isNewEntry)
         cacheItem->clear();
@@ skipping 60 matching lines @@
     // CSSPropertyInternalCallback sets the rule's selector name into the RenderStyle, and that's not recalculated if the RenderStyle is loaded from the cache, so don't cache it.
     if (!style->callbackSelectors().isEmpty())
         return false;
     // The cache assumes static knowledge about which properties are inherited.
     if (parentStyle->hasExplicitlyInheritedProperties())
         return false;
     return true;
 }
 
 }